date-fns/CHANGELOG.md

Modern JavaScript date utility library

# Change Log

All notable changes to this project will be documented in this file.
This project adheres to [Semantic Versioning].

This change log follows the format documented in [Keep a CHANGELOG].

[semantic versioning]: http://semver.org/
[keep a changelog]: http://keepachangelog.com/

## v4.1.0 - 2024-09-17

This release adds time zone support to format functions (that I somehow missed when working on the feature) and fixes a few bugs.

Make sure also upgrade `TZDate` to v1.0.2 as it [includes a bunch of critical bug fixes](https://github.com/date-fns/tz/blob/main/CHANGELOG.md#v102---2024-09-14).

### Fixed

- Fixed internal `constructFrom` throwing an exception on `null` arguments. While `null` isn't allowed, the functions should rather return `Invalid Date` or `NaN` in such cases. See [#3885](https://github.com/date-fns/date-fns/issues/3885).

### Added

- Added missing time zone support to `format`, `formatISO`, `formatISO9075`, `formatRelative` and `formatRFC3339`. See [#3886](https://github.com/date-fns/date-fns/issues/3886).

## v4.0.0 - 2024-09-16

I have great news! First, ten years after its release, date-fns finally gets first-class time zone support.

Another great news is that there aren't many breaking changes in this release. All of them are type-related and will affect only those explicitly using internal date-fns types. Finally, it has been less than a year since the last major release, which is an improvement over the previous four years between v2 and v3. I plan on keeping the pace and minimizing breaking changes moving forward.

[Read more about the release in the announcement blog post](https://blog.date-fns.org/v40-with-time-zone-support/).

\- [Sasha @kossnocorp](https://twitter.com/kossnocorp)

### Added

- Added time zones support via [`@date-fns/tz`](https://github.com/date-fns/tz)'s `TZDate` class and `tz` helper function. See its [README](https://github.com/date-fns/tz) for the details about the API.

- All relevant functions now accept the context `in` option, which allows to specify the time zone to make the calculations in. If the function also returns a date, it will be in the specified time zone:

  ```ts
  import { addDays, startOfDay } from "date-fns";
  import { tz } from "@date-fns/tz";

  startOfDay(addDays(Date.now(), 5, { in: tz("Asia/Singapore") }));
  //=> "2024-09-16T00:00:00.000+08:00"
  ```

  In the example, `addDays` will get the current date and time in Singapore and add 5 days to it. `startOfDay` will inherit the date type and return the start of the day in Singapore.

### Changed

- The function arguments, as well as `Interval`'s `start` and `end`, now can be of different types, allowing you to mix `UTCDate`, `TZDate`, `Date`, and other extensions, as well as primitives (strings and numbers).

  The functions will normalize these values, make calculations, and return the result in the same type, preventing any bugs caused by the discrepancy. If passed, the type will be inferred from the context `in` option or the first encountered argument object type. The `Interval`'s `start` and `end` will be considered separately, starting from `start`.

  In the given example, the result will be in the `TZDate` as the first argument is a number, and the `start` takes precedence over the `end`.

  ```ts
  clamp(Date.now(), {
    start: new TZDate(start, "Asia/Singapore"),
    end: new UTCDate(),
  });
  //=> TZDate
  ```

- **BREAKING**: This release contains a bunch of types changes that should not affect the library's expected usage. The changes are primarily internal and nuanced, so rather than listing them here, I recommend you running the type checker after the upgrade. If there are unfixable problems, please [open an issue](https://github.com/date-fns/date-fns/issues/new).

- **BREAKING**: The package now is ESM-first. The CommonJS is still support and It should not affect most users, but it might break in certains environments. If you encounter any issues, please [report them](https://github.com/date-fns/date-fns/issues/new).

### Fixed

- Fixed CDN build compatibility with jQuery and other tools that expose `$` by properly wrapping the code in an IIFE.

## v3.6.0 - 2024-03-18

On this release worked @kossnocorp and @world1dan. Also, thanks to [@seated](https://github.com/seated) [for sponsoring me](https://github.com/sponsors/kossnocorp).

### Fixed

- [Fixed weeks in the Belarisuan locale's `formatDistance`.](https://github.com/date-fns/date-fns/pull/3720)

### Added

- [Added CDN versions of modules compatible with older browsers.](https://github.com/date-fns/date-fns/pull/3737) [See the CDN guide.](https://date-fns.org/docs/CDN)

## v3.5.0 - 2024-03-15

Kudos to @fturmel, @kossnocorp, @makstyle119, @tan75, @marcreichel, @tareknatsheh and @audunru for working on the release. Also, thanks to [@seated](https://github.com/seated) [for sponsoring me](https://github.com/sponsors/kossnocorp).

### Fixed

- [Fixed functions that use current date internally and made them work with date extensions like `UTCDate`.](https://github.com/date-fns/date-fns/issues/3730)

- [Fixed `daysToWeeks` returning negative 0.](https://github.com/date-fns/date-fns/commit/882ced61c692c7c4a79eaaec6eb07cb9c8c9195b)

- [Fixed German grammar for the "half a minute" string.](https://github.com/date-fns/date-fns/pull/3715)

### Added

- [Added the Northern Sámi (`se`) locale.](https://github.com/date-fns/date-fns/pull/3724)

- Added the `constructNow` function that creates the current date using the passed reference date's constructor.

## v3.4.0 - 2024-03-11

Kudos to @kossnocorp, @sakamossan and @Revan99 for working on the release. Also, thanks to [@seated](https://github.com/seated) [for sponsoring me](https://github.com/sponsors/kossnocorp).

### Added

- [Added `roundToNearestHours` function.](https://github.com/date-fns/date-fns/pull/2752)

- [Added Central Kurdish (`ckb`) locale.](https://github.com/date-fns/date-fns/pull/3421)

## v3.3.1 - 2024-01-22

Kudos to @kossnocorp and @fturmel for working on the release.

### Fixed

- Fixed DST issue in `getOverlappingDaysInIntervals`, resulting in an inconsistent number of days returned for intervals starting and ending in different DST periods.

- Fixed functions incorrectly using `trunc` instead of `round`. The bug was introduced in v3.3.0. The affected functions: `differenceInCalendarDays`, `differenceInCalendarISOWeeks`, `differenceInCalendarWeeks`, `getISOWeek`, `getWeek`, and `getISOWeeksInYear`.

## v3.3.0 - 2024-01-20

On this release worked @kossnocorp, @TheKvikk, @fturmel and @ckcherry23.

### Fixed

- Fixed the bug in `getOverlappingDaysInIntervals` caused by incorrect sorting of interval components that led to 0 for timestamps of different lengths.

- Fixed bugs when working with negative numbers caused by using `Math.floor` (`-1.1` → `-2`) instead of `Math.trunc` (`-1.1` → `-1`). Most of the conversion functions (i.e., `hoursToMinutes`) were affected when passing some negative fractional input. Also, some other functions that could be possibly affected by unfortunate timezone/date combinations were fixed.

  The functions that were affected: `format`, `parse`, `getUnixTime`, `daysToWeeks`, `hoursToMilliseconds`, `hoursToMinutes`, `hoursToSeconds`, `milliseconds`, `minutesToMilliseconds`, `millisecondsToMinutes`, `monthsToYears`, `millisecondsToHours`, `millisecondsToSeconds`, `minutesToHours`, `minutesToSeconds`, `yearsToQuarters`, `yearsToMonths`, `yearsToDays`, `weeksToDays`, `secondsToMinutes`, `secondsToHours`, `quartersToYears`, `quartersToMonths` and `monthsToQuarters`.

- [Fixed the Czech locale's `formatDistance` to include `1` in `formatDistance`.](https://github.com/date-fns/date-fns/pull/3269)

- Fixed `differenceInSeconds` and other functions relying on rounding options that can produce a negative 0.

- [Added a preprocessor to the locales API, enabling fixing a long-standing bug in the French locale.](https://github.com/date-fns/date-fns/pull/3662) ([#1391](https://github.com/date-fns/date-fns/issues/1391))

- Added missing `yearsToDays` to the FP submodule.

- Made functions using rounding methods always return `0` instead of `-0`.

### Added

- [Added `format` alias `formatDate` with corresponding `FormatDateOptions` interface](https://github.com/date-fns/date-fns/pull/3653).

## v3.2.0 - 2024-01-09

This release is brought to you by @kossnocorp, @fturmel, @grossbart, @MelvinVermeer, and @jcarstairs-scottlogic.

### Fixed

- Fixed types compatibility with Lodash's `flow` and fp-ts's `pipe`. ([#3641](https://github.com/date-fns/date-fns/issues/3641))

- [Fixed inconsistent behavior of `roundToNearestMinutes`.](https://github.com/date-fns/date-fns/pull/3132)

### Added

- Added exports of `format`, `lightFormat`, and `parse` internals that enable 3rd-parties to consume those.

## v3.1.0 - 2024-01-05

This release is brought to you by @kossnocorp, @makstyle119 and @dmgawel.

### Fixed

- [Fixed the plural form of weeks in Swedish](https://github.com/date-fns/date-fns/pull/3448).

### Added

- [Added `yearsToDays` function](https://github.com/date-fns/date-fns/pull/3540).

- Added warning about using protected tokens like `Y` or `D` without passing a corresponding option. [See #2950](https://github.com/date-fns/date-fns/issues/2950).

## v3.0.6 - 2023-12-22

On this release worked @imwh0im, @jamcry and @tyrw.

### Fixed

- [Fixed bug in `areIntervalsOverlapping` caused by incorrect sorting](https://github.com/date-fns/date-fns/pull/3628) ([#3614](https://github.com/date-fns/date-fns/issues/3614))

## v3.0.5 - 2023-12-21

This release is brought to you by @goku4199.

### Fixed

- [Fixed internal `toDate` not processing string arguments properly](https://github.com/date-fns/date-fns/pull/3626)

## v3.0.4 - 2023-12-21

This release is brought to you by @kossnocorp.

### Fixed

- Fixed isWithinInterval bug caused by incorrectly sorting dates ([#3623](https://github.com/date-fns/date-fns/issues/3623)).

## v3.0.3 - 2023-12-21

### Fixed

- Rolled back pointing ESM types to the same `d.ts` files. Instead now it copies the content to avoid [the Masquerading as CJS problem](https://github.com/arethetypeswrong/arethetypeswrong.github.io/blob/main/docs/problems/FalseCJS.md) reported by "Are the types wrong?".

## v3.0.2 - 2023-12-21

### Fixed

- Fixed [yet another issue caused by ESM types](https://github.com/date-fns/date-fns/issues/3620) by pointing to the same `d.ts` files.

- [Added `package.json` to exports](https://github.com/date-fns/date-fns/pull/3601) to provide access to tooling.

- [Fixed TypeScript 5.4 build break](https://github.com/date-fns/date-fns/pull/3598) by using the latest type names.

## v3.0.1 - 2023-12-20

### Fixed

- [Fixed an error](https://github.com/date-fns/date-fns/pull/3618) in certain environments caused by `d.mts` files exporting only types.

## v3.0.0 - 2023-12-18

### Changed

- **BREAKING**: date-fns is now a dual-package with the support of both ESM and CommonJS. The files exports are now explicitly in the `package.json`. The ESM files now have `.mjs` extension.

- **BREAKING**: The package now has a flat structure, meaning functions are now named `node_modules/date-fns/add.mjs`, locales are `node_modules/date-fns/locale/enUS.mjs`, etc.

- **BREAKING**: Now all file content’s exported via named exports instead of `export default`, which will require change direct imports i.e. `const addDays = require(‘date-fns/addDays’)` to `const { addDays } = require(‘date-fns/addDays’)`.

- **BREAKING**: TypeScript types are now completely rewritten, check out the `d.ts` files for more information.

- **BREAKING**: `constants` now is not exported via the index, so to import one use `import { daysInYear } from "date-fns/constants";`. It improves compatibility with setups that modularize imports [like Next.js](https://twitter.com/kossnocorp/status/1731181274579325260).

- **BREAKING**: Functions now don’t check the number of passed arguments, delegating this task to type checkers. The functions are now slimmer because of this.

- **BREAKING** The arguments are not explicitly converted to the target types. Instead, they are passed as is, delegating this task to type checkers.

- **BREAKING**: Functions that accept `Interval` arguments now do not throw an error if the start is before the end and handle it as a negative interval. If one of the properties in an `Invalid Date`, these functions also do not throw and handle them as invalid intervals.

  - `areIntervalsOverlapping` normalize intervals before comparison, so `{ start: a, end: b }` is practically equivalent to `{ start: b, end: a }`. When comparing intervals with one of the properties being `Invalid Date`, the function will return false unless the others are valid and equal, given the `inclusive` option is passed. Otherwise, and when even one of the intervals has both properties invalid, the function will always return `false`.

  - `getOverlappingDaysInIntervals` now normalizes intervals before comparison, so `{ start: a, end: b }` is practically equivalent to `{ start: b, end: a }`. If any of the intervals’ properties is an `Invalid Date`, the function will always return 0.

  - `isWithinInterval` now normalizes intervals before comparison, so `{ start: a, end: b }` is practically equivalent to `{ start: b, end: a }`. If any of the intervals’ properties is an `Invalid Date`, the function will always return false.

  - `intervalToDuration` now returns negative durations for negative intervals. If one or both of the interval properties are invalid, the function will return an empty object.

  - The eachXOfInterval functions (`eachDayOfInterval`, `eachHourOfInterval`, `eachMinuteOfInterval`, `eachMonthOfInterval`, `eachWeekendOfInterval`, `eachWeekendOfMonth`, `eachWeekendOfYear`, `eachWeekOfInterval`, `eachYearOfInterval`) now return a reversed array if the passed interval’s start is after the end. Invalid properties will result in an empty array. Functions that accept the `step` option now also allow negative, 0, and NaN values and return reversed results if the step is negative and an empty array otherwise.

- **BREAKING**: `intervalToDuration` now skips 0 values in the resulting duration, resulting in more compact objects with only relevant properties.

- **BREAKING**: `roundToNearestMinutes` now returns `Invalid Date` instead of throwing an error when `nearestTo` option is less than 1 or more than 30.

- **BREAKING**: IE is no longer supported.

- **BREAKING**: Now all functions use `Math.trunc` rounding method where rounding is required. The behavior is configurable on a per-function basis.

- **BREAKING**: Undocumented `onlyNumeric` option was removed from `nn` and `sv` locales. If you relied on it, [please contact me](mailto:koss@nocorp.me).

- **BREAKING**: Flow is not supported anymore. If you relied on it, [please contact me](mailto:koss@nocorp.me).

- **BREAKING**: The locales now use regular functions instead of the UTC version, which should not break any code unless you used locales directly.

### Added

- All functions that accept date arguments now also accept strings.

- All functions now export options interfaces.

- Now functions allow passing custom Date extensions like [UTCDate](https://github.com/date-fns/utc). They will detect and use the arguments constructor to generate the result of the same class.

- `eachMonthOfInterval`, `eachQuarterOfInterval`, `eachWeekOfInterval`, and `eachYearOfInterval` now accept the `step` option like most of the eachXOfInterval functions.

- A new `interval` function that validates interval, emulating the v2 interval functions behavior.

- `differenceInX` functions now accept options and allow setting up `roundingMethod` that configures how the result is rounded. `Math.trunc` is the default method.

## v2.30.0

Kudos to @kossnocorp and @Andarist for working on the release.

### Changes

- Fixed increased build size after enabling compatibility with older browsers in the previous release. This was done by adding @babel/runtime as a dependency. [See more details](https://github.com/date-fns/date-fns/issues/3208#issuecomment-1528592465).

## v2.29.3 - 2022-09-13

This release is prepared by our own @leshakoss.

### Fixed

- [Fixed Ukrainian (`uk`) locale grammar for `formatDistance`.](https://github.com/date-fns/date-fns/pull/3175)

- [Improved browser compatibility by transforming the code with `@babel/preset-env`.](https://github.com/date-fns/date-fns/pull/3167)

## v2.29.2 - 2022-08-18

This release is brought to you by @nopears, @vadimpopa and @leshakoss.

### Fixed

- [Fixed `sv` locale abbreviated months matcher.](https://github.com/date-fns/date-fns/pull/3160)

- [Fixed `uk` locale abbreviated months matcher.](https://github.com/date-fns/date-fns/pull/3139)

- [Fixed a breaking change in `intervalToDuration` by removing a recently introduced RangeError.](https://github.com/date-fns/date-fns/pull/3153)

## v2.29.1 - 2022-08-18

Thanks to @fturmel for working on the release.

### Fixed

- [Fixed TypeScript and flow types for daysInYear constant.](https://github.com/date-fns/date-fns/pull/3125)

## v2.29.0 - 2022-07-22

On this release worked @tan75, @kossnocorp, @nopears, @Balastrong, @cpapazoglou, @dovca, @aliasgar55, @tomchentw, @JuanM04, @alexandresaura, @fturmel, @aezell, @andersravn, @TiagoPortfolio, @SukkaW, @Zebreus, @aviskarkc10, @maic66, @a-korzun, @Mejans, @davidspiess, @alexgul1, @matroskin062, @undecaf, @mprovenc, @jooola and @leshakoss.

### Added

- [Added `intlFormatDistance` function`.](https://github.com/date-fns/date-fns/pull/2173)

- [Added `setDefaultOptions` and `getDefaultOptions` functions that allow you to set default default locale, `weekStartsOn` and `firstWeekContainsDate`.](https://github.com/date-fns/date-fns/pull/3069)

- [Added `roundingMethod` option to `roundToNearestMinutes`.](https://github.com/date-fns/date-fns/pull/3091)

- [Added Swiss Italian locale (`it-CH`).](https://github.com/date-fns/date-fns/pull/2886)

- [Added Occitan (`oc`) locale.](https://github.com/date-fns/date-fns/pull/2106) ([#2061](https://github.com/date-fns/date-fns/issues/2061))

- [Added Belarusian Classic (`be-tarask`) locale.](https://github.com/date-fns/date-fns/pull/3115)

### Fixed

- [Fixed Azerbaijani (`az`) locale for `formatDistance`.](https://github.com/date-fns/date-fns/pull/2924)

- [Fixed Czech (`cs`) locale for `parse`.](https://github.com/date-fns/date-fns/pull/3059)

- [Fixed TypeScript types for constants.](https://github.com/date-fns/date-fns/pull/2941)

- [Fixed long formatters in the South African English locale (`en-ZA`).](https://github.com/date-fns/date-fns/pull/3014)

- [Fixed a typo in the Icelandic locale (`is`) for `format`.](https://github.com/date-fns/date-fns/pull/2974)

- [Fixed weekday format for `formatRelative` in the Portuguese locale (`pt`).](https://github.com/date-fns/date-fns/pull/2992)

- [Fixed `intervalToDuration` being off by 1 day sometimes.](https://github.com/date-fns/date-fns/pull/2616)

- [Fixed ordinal number formatting in Italian locale (`it`).](https://github.com/date-fns/date-fns/pull/1617)

- [Fixed issue parsing months in Croatian (`hr`), Georgian (`ka`) and Serbian (`sr` and `sr-Latn`) locales.](https://github.com/date-fns/date-fns/pull/2898)

### Changed

- [Replaced `git.io` links with full URLs in error messages.](https://github.com/date-fns/date-fns/pull/3021)

- [_Internal_: removed "v2.0.0 breaking changes" section from individual function docs](https://github.com/date-fns/date-fns/pull/2905)

## v2.28.0 - 2021-12-28

Kudos to @tan75, @fturmel, @arcanar7, @jeffjose, @helmut-lang, @zrev2220, @jooola, @minitesh, @cowboy-bebug, @mesqueeb, @JuanM04, @zhirzh, @damon02 and @leshakoss for working on the release.

### Added

- [Added West Frisian (`fy`) locale.](https://github.com/date-fns/date-fns/pull/2183)

- [Added Uzbek Cyrillic locale (`uz-Cyrl`).](https://github.com/date-fns/date-fns/pull/2811)

### Fixed

- [add the missing accent mark for Saturday in Spanish locale (`es`) for `format`.](https://github.com/date-fns/date-fns/pull/2869)

- [allowed `K` token to be used with `a` or `b` in `parse`.](https://github.com/date-fns/date-fns/pull/2814)

## v2.27.0 - 2021-11-30

Kudos to @tan75, @hg-pyun, @07akioni, @razvanmitre, @Haqverdi, @pgcalixto, @janziemba, @fturmel, @JuanM04, @zhirzh, @seanghay, @bulutfatih, @nodeadtree, @cHaLkdusT, @a-korzun, @fishmandev, @wingclover, @Zacharias3690, @kossnocorp and @leshakoss for working on the release.

### Fixed

- [Fixed translation for quarters in `format` in Chinese Simplified locale (`zh-CN`).](https://github.com/date-fns/date-fns/pull/2771)

- [Fixed `P` token in `format` for Romanian locale (`ro`).](https://github.com/date-fns/date-fns/pull/2213)

- [Fixed era and month formatters in Azerbaijani locale (`az`).](https://github.com/date-fns/date-fns/pull/1632)

- [Fixed `formatRelative` patterns in Georgian locale (`ka`).](https://github.com/date-fns/date-fns/pull/2797)

- [Fixed regular expressions for `parse` in Estonian locale (`er`).](https://github.com/date-fns/date-fns/pull/2038)

- [Fixed the format of zeros in `formatDuration` in Czech locale (`cs`).](https://github.com/date-fns/date-fns/pull/2579)

- [Fixed ordinal formatting for years, weeks, hours, minutes and seconds in `fr`, `fr-CA` and `fr-CH` locales.](https://github.com/date-fns/date-fns/pull/2626)

- [Fixed constants not having proper TypeScript and Flow types.](https://github.com/date-fns/date-fns/pull/2791)

- [Fixed translation for Monday in Turkish locale (`tr`).](https://github.com/date-fns/date-fns/pull/2720)

- [Fixed `eachMinuteOfInterval` not handling intervals less than a minute correctly.](https://github.com/date-fns/date-fns/pull/2603)

- [Fixed flow types for `closestTo` and `closestIndexTo`.](https://github.com/date-fns/date-fns/pull/2781)

### Added

- [Added Khmer locale (`km`).](https://github.com/date-fns/date-fns/pull/2713)

## v2.26.0 - 2021-11-19

Thanks to @kossnocorp, @leshakoss, @tan75, @gaplo, @AbdAllahAbdElFattah13, @fturmel, @kentaro84207, @V-Gutierrez, @atefBB, @jhonatanmacazana, @zhirzh, @Haqverdi, @mandaputtra, @micnic and @rikkalo for working on the release.

### Fixed

- [Fixed `formatRelative` format for `lastWeek` in Spanish locale.](https://github.com/date-fns/date-fns/pull/2753)

- [Fixed translation for October in Hindi locale.](https://github.com/date-fns/date-fns/pull/2729)

- [Fixed Azerbaijani locale to use correct era matchers for `parse`.](https://github.com/date-fns/date-fns/pull/1633)

- [Added the functions that use `weekStartsOn` and `firstWeekContainsDate` that were missing from the `Locale` documentation page.](https://github.com/date-fns/date-fns/pull/2652)

### Changed

- [Changed abbreviation for August from "Ags" to "Agt" in Indonesian locale.](https://github.com/date-fns/date-fns/pull/2658)

### Added

- [Added Irish English locale (`en-IE`).](https://github.com/date-fns/date-fns/pull/2772)

- [Added Arabic locale (`ar`).](https://github.com/date-fns/date-fns/pull/2721) ([#1670](https://github.com/date-fns/date-fns/issues/1670))

- [Added Hong Kong Traditional Chinese locale (zh-HK).](https://github.com/date-fns/date-fns/pull/2686) ([#2684](https://github.com/date-fns/date-fns/issues/2684))

- [Added Egyptian Arabic locale (ar-EG).](https://github.com/date-fns/date-fns/pull/2699)

## v2.25.0 - 2021-10-05

This release is brought to you by @kossnocorp, @gierschv, @fturmel, @redbmk, @mprovenc, @artyom-ivanov and @tan75.

### Added

- [Added Japanese Hiragana locale (`ja-Hira`).](https://github.com/date-fns/date-fns/pull/2663)

- [Added standalone months support to `de` and `de-AT` locales.](https://github.com/date-fns/date-fns/pull/2602)

## v2.24.0 - 2021-09-17

Kudos to [Sasha Koss](http://github.com/kossnocorp), [Lucas Silva](http://github.com/LucasHFS), [Jan Ziemba](http://github.com/janziemba), [Anastasia Kobzar](http://github.com/rikkalo), [Deepak Gupta](http://github.com/Mr-DG-Wick), [Jonas L](http://github.com/jooola), [Kentaro Suzuki](http://github.com/kentaro84207), [Koussay Haj Kacem](http://github.com/essana3), [fturmel](http://github.com/fturmel), [Tan75](http://github.com/tan75) and [Adriaan Callaerts](http://github.com/call-a3) for working on the release.

### Fixed

- [Fixed an edge case in the Slovak locale caused by unescaped character.](https://github.com/date-fns/date-fns/pull/2540) ([#2083](https://github.com/date-fns/date-fns/issues/2083))

### Changed

- [Used `1` instead of `ein` for German `formatDuration` to make it consistent with other locales and formats.](https://github.com/date-fns/date-fns/pull/2576) ([#2505](https://github.com/date-fns/date-fns/issues/2505))

- [Made Norwegian `formatDuration` consistent with other locales by using numeric representation instead of written.](https://github.com/date-fns/date-fns/pull/2631) ([#2469](https://github.com/date-fns/date-fns/issues/2469))

- [Use the word "sekunda" instead of "vteřina" for second in the Czech locale.](https://github.com/date-fns/date-fns/pull/2577)

- [Made Flemish short date format corresponds to the Flemish government.](https://github.com/date-fns/date-fns/pull/2535)

### Added

- [Added `roundingMethod` option to `differenceInHours`, `differenceInMinutes`, `differenceInQuarters`, `differenceInSeconds` and `differenceInWeeks` with `trunc` as the default method.](https://github.com/date-fns/date-fns/pull/2571) ([#2555](https://github.com/date-fns/date-fns/issues/2555))

- [Added new functions: `previousDay`, `previousMonday`, `previousTuesday`, `previousWednesday`, `previousThursday`, `previousFriday`, `previousSaturday` and `previousSunday`.](https://github.com/date-fns/date-fns/pull/2522)

## v2.23.0 - 2021-07-23

Thanks to [Liam Tait](http://github.com/Liam-Tait), [fturmel](http://github.com/fturmel), [Takuya Uehara](http://github.com/indigolain), [Branislav Lazic](http://github.com/BranislavLazic), [Seyyed Morteza Moosavi](http://github.com/smmoosavi), [Felipe Armoni](http://github.com/komyg), [Sasha Koss](http://github.com/kossnocorp), [Michael Mok](http://github.com/pmmmwh), [Tan75](http://github.com/tan75) and [Maxim Topciu](http://github.com/maximtop) for working on the release.

### Changed

- [Improved `nextDay` performance by roughly 50%.](https://github.com/date-fns/date-fns/pull/2524)

- [Added more ordinal formatting to the Japanese locale.](https://github.com/date-fns/date-fns/pull/2471)

### Added

- [Added a new `clamp` function that allows to bound a date to an interval.](https://github.com/date-fns/date-fns/pull/2498)

- [Added Bosnian locale (bs).](https://github.com/date-fns/date-fns/pull/2495)

- [Allowed passing `undefined` in the duration to add and sub functions.](https://github.com/date-fns/date-fns/pull/2515)

## v2.22.1 - 2021-05-28

Thanks to [Sasha Koss](http://github.com/kossnocorp) for working on the release.

### Fixed

- Fixed constant typings. ([#2491](https://github.com/date-fns/date-fns/issues/2491))

## v2.22.0 - 2021-05-28

[Sasha Koss](http://github.com/kossnocorp), [Lucas Silva](http://github.com/LucasHFS), [Lay](http://github.com/brownsugar), [jwbth](http://github.com/jwbth), [fturmel](http://github.com/fturmel), [Tan75](http://github.com/tan75) and [Anastasia Kobzar](http://github.com/rikkalo) worked on this release.

### Fixed

- [Fixed Taiwanese locale to use traditional Chinese and removed unnecessary spaces.](https://github.com/date-fns/date-fns/pull/2436)

- [Fixed Russian locale to use correct long formats.](https://github.com/date-fns/date-fns/pull/2478)

### Added

- [Added 18 new conversion functions](https://github.com/date-fns/date-fns/pull/2433):
  - `daysToWeeks`
  - `hoursToMilliseconds`
  - `hoursToMinutes`
  - `hoursToSeconds`
  - `millisecondsToHours`
  - `millisecondsToMinutes`
  - `millisecondsToSeconds`
  - `minutesToHours`
  - `minutesToMilliseconds`
  - `minutesToSeconds`
  - `monthsToQuarters`
  - `monthsToYears`
  - `quartersToMonths`
  - `quartersToYears`
  - `secondsToHours`
  - `secondsToMilliseconds`
  - `secondsToMinutes`
  - `weeksToDays`
  - `yearsToMonths`
  - `yearsToQuarters`

## v2.21.3 - 2021-05-08

This release is brought to you by [Maxim Topciu](http://github.com/maximtop).

### Fixed

- [Fixed IE11 support by babelifing the shorthand properties.](https://github.com/date-fns/date-fns/pull/2467)

## v2.21.2 - 2021-05-05

Kudos to [Aleksei Korzun](http://github.com/a-korzun), [Maxim Topciu](http://github.com/maximtop), [Jonas L](http://github.com/jooola), [Mohammad ali Ali panah](http://github.com/always-maap) and [Tan75](http://github.com/tan75) for working on the release.

### Fixed

- [`differenceInBusinessDays` now returns `NaN` instead of `Invalid Date` when an invalid argument is passed to the function.](https://github.com/date-fns/date-fns/pull/2414)

- [Fixed `weekStartsOn` in Persian locale.](https://github.com/date-fns/date-fns/pull/2430)

## v2.21.1 - 2021-04-15

Thanks to [Sasha Koss](http://github.com/kossnocorp) for working on the release.

### Fixed

- [Fixed a breaking change introduced by using modern default argument value syntax (see https://github.com/Hacker0x01/react-datepicker/issues/2870).](https://github.com/date-fns/date-fns/pull/2423)

## v2.21.0 - 2021-04-14

This release is brought to you by [Aleksei Korzun](http://github.com/a-korzun), [Tan75](http://github.com/tan75), [Rubens Mariuzzo](http://github.com/rmariuzzo), [Christoph Stenglein](http://github.com/cstenglein) and [Clément Tamisier](http://github.com/ctamisier).

### Fixed

- [Made `formatDistanceStrict` return `12 months` instead of `1 year` when `unit: 'month'`.](https://github.com/date-fns/date-fns/pull/2411)

### Added

- [Added Haitian Creole (`ht`) locale.](https://github.com/date-fns/date-fns/pull/2396)
- [Added Austrian German (`de-AT`) locale.](https://github.com/date-fns/date-fns/pull/2362)

## v2.20.3 - 2021-04-13

Kudos to [fturmel](http://github.com/fturmel) for working on the release.

### Fixed

- [Fixed broken tree-shaking caused by missing links to corresponding ESM.](https://github.com/date-fns/date-fns/pull/2339) ([#2207](https://github.com/date-fns/date-fns/issues/2207))

## v2.20.2 - 2021-04-12

Kudos to [Maxim Topciu](http://github.com/maximtop) for working on the release.

### Fixed

- [Fixed IE11 incompatibility caused by the usage of spread syntax.](https://github.com/date-fns/date-fns/pull/2407) ([#2408](https://github.com/date-fns/date-fns/issues/2408))

## v2.20.1 - 2021-04-09

This release is brought to you by [Sasha Koss](http://github.com/kossnocorp) and [Tan75](http://github.com/tan75).

### Fixed

- Fixed `isDate` Flow typings that we broke in `v2.20.0`.

## v2.20.0 - 2021-04-08

This release is brought to you by [Sasha Koss](http://github.com/kossnocorp), [Maxim Topciu](http://github.com/maximtop), [tu4mo](http://github.com/tu4mo), [Tan75](http://github.com/tan75), [Ardit Dine](http://github.com/arditdine), [Carl Rosell](http://github.com/CarlRosell), [Roman Mahotskyi](http://github.com/enheit), [Mateusz Krzak](http://github.com/mateuszkrzak), [fgottschalk](http://github.com/fgottschalk), [Anastasia Kobzar](http://github.com/rikkalo), [Bilguun Ochirbat](http://github.com/bilguun0203), [Lesha Koss](http://github.com/leshakoss), [YuLe](http://github.com/yuler) and [guyroberts21](http://github.com/guyroberts21).

### Fixed

- [Made `formatDistanceStrict` and `formatDistanceToNowStrict` always return `1 year` instead of `12 months`.](https://github.com/date-fns/date-fns/pull/2391) ([#2388](https://github.com/date-fns/date-fns/issues/2388))

- Fixed `nextDay`, `nextMonday` and `nextTuesday` missing in exports and type definitions. ([#2325](https://github.com/date-fns/date-fns/issues/2325))

- [Fixed a DST bug in `formatDistanceStrict`.](https://github.com/date-fns/date-fns/pull/2329) ([#2307](https://github.com/date-fns/date-fns/issues/2307))

### Added

- [Added new `eachMinuteOfInterval` function.](https://github.com/date-fns/date-fns/pull/2382)

- [Added Albanian (`sq`) locale](https://github.com/date-fns/date-fns/pull/2290)

- [Added Mongolian (`mn`) locale](https://github.com/date-fns/date-fns/pull/1961)

- [Added `nextWednesday`, `nextThursday`, `nextFriday`, `nextSaturday` and `nextSunday`.](https://github.com/date-fns/date-fns/pull/2291)

## v2.19.0 - 2021-03-05

[Tan75](http://github.com/tan75) worked on this release.

### Fixed

- [Assigned the correct `firstWeekContainsDate` value (`4`) for the French locale.](https://github.com/date-fns/date-fns/pull/2273) ([#2148](https://github.com/date-fns/date-fns/issues/2148))

- [Fixed torsdag abbreviation in the Swedish locale.](https://github.com/date-fns/date-fns/pull/2220)

- [Fixed a bug in `differenceInMonths` and `intervalToDuration` that occurs when dealing with the 28th of February.](https://github.com/date-fns/date-fns/pull/2256) ([#2255](https://github.com/date-fns/date-fns/issues/2255))

### Added

- [Added new functions: `nextDay`, `nextMonday` and `nextTuesday` that allows getting the next day of the week, Monday or Tuesday respectively.](https://github.com/date-fns/date-fns/pull/2214)

## v2.18.0 - 2021-03-01

Thanks to [Tan75](http://github.com/tan75) and [Lesha Koss](http://github.com/leshakoss).

### Fixed

- [Fixed documentation missing for `intlFormat`.](https://github.com/date-fns/date-fns/pull/2259) ([#2258](https://github.com/date-fns/date-fns/issues/2258))

- [Fixed date formats in the Latvian locale.](https://github.com/date-fns/date-fns/pull/2205) ([#2202](https://github.com/date-fns/date-fns/issues/2202))

### Added

- [Added support of positive and negative offsets in `parseJSON`.](https://github.com/date-fns/date-fns/pull/2200) ([#2149](https://github.com/date-fns/date-fns/issues/2149))

## [2.17.0] - 2021-02-05

Kudos to [@shaykav](https://github.com/date-fns/date-fns/pull/1952), [@davidgape89](https://github.com/davidgape89), [@rikkalo](https://github.com/rikkalo), [@tan75](https://github.com/tan75), [@talgautb](https://github.com/talgautb), [@owenl131](https://github.com/owenl131), [@kylesezhi](https://github.com/kylesezhi), [@inigoiparragirre](https://github.com/inigoiparragirre), [@gius](https://github.com/gius), [@Endeauvirr](https://github.com/Endeauvirr) and [@frankyston](https://github.com/frankyston).

### Fixed

- [Fixed Russian locale parsing issue](https://github.com/date-fns/date-fns/pull/1950).

- [Fixed `differenceInMonths` for edge cases, such as the end of February dates](https://github.com/date-fns/date-fns/pull/2185).

- [Fixed suffixes for the Kazakh locale](https://github.com/date-fns/date-fns/pull/2010).

- [Fixed `formatDuration` week translation in `pt` and `pt-BR` locales](https://github.com/date-fns/date-fns/pull/2125).

- [Made Japanese locale to use the correct value for the start of the week](https://github.com/date-fns/date-fns/pull/2099).

- [Adjusted date formats in the Basque locale](https://github.com/date-fns/date-fns/pull/2080).

- [Fixed the short and medium date formats in the Czech locale](https://github.com/date-fns/date-fns/pull/2111).

- [Adjusted the Polish translations of `formatDistance`](https://github.com/date-fns/date-fns/pull/2187).

- [Fixed the week's abbreviations in the Brazilian Portuguese](https://github.com/date-fns/date-fns/pull/2170).

### Added

- [Added `intlFormat`](https://github.com/date-fns/date-fns/pull/2172) a lightweight formatting function that uses [Intl API](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl). Eventually, it will become the default formatting function, so it's highly recommended for new code.

- [Added `en-ZA` locale](https://github.com/date-fns/date-fns/pull/1952).

- [Added an ability to format lowercase am/pm with `aaa` and `bbb` tokens](https://github.com/date-fns/date-fns/pull/2016).

- [Added ordinal formatting for Japanese year values](https://github.com/date-fns/date-fns/pull/2177/files).

## [2.16.1] - 2020-07-31

Kudos to [@aleksaps](https://github.com/aleksaps), [@leedriscoll](https://github.com/leedriscoll) and [@BanForFun](https://github.com/BanForFun) for pull-requests!

### Fixed

- [Fixed a typo in Scottish Gaelic (gd) locale](https://github.com/date-fns/date-fns/pull/1925).
- [Fixed typos in Serbian Latin locale](https://github.com/date-fns/date-fns/pull/1928).
- [Fixed greek grammar for Saturday on `formatRelative`](https://github.com/date-fns/date-fns/pull/1930).
- Removed locale snapshots from the npm package making it lighter.

## [2.16.0] - 2020-08-27

Kudos to [@jvpelt](https://github.com/jvpelt), [@piotrl](https://github.com/piotrl), [@yotamofek](https://github.com/yotamofek), [@dwaxweiler](https://github.com/dwaxweiler), [@leedriscoll](https://github.com/leedriscoll) and [@bradevans](https://github.com/bradevans) for working on the release. Also thanks to [@PascalHonegger](https://github.com/PascalHonegger), [@pickfire](https://github.com/pickfire), [@TheJaredWilcurt](https://github.com/TheJaredWilcurt), [@SidKH](https://github.com/SidKH) and [@nfantone](https://github.com/nfantone) for improving the documentation.

### Fixed

- [Added correct translations for Welsh `1 minute` and `2 days`](https://github.com/date-fns/date-fns/pull/1903).
- [Fixed `formatRFC3339` formatting timezone offset with minutes](https://github.com/date-fns/date-fns/pull/1890).
- [Added missing locale type definition for `formatDuration`](https://github.com/date-fns/date-fns/pull/1881)
- [Fixed Scottish Gaelic locale issues](https://github.com/date-fns/date-fns/pull/1914).

### Changed

- [Used shorter Hebrew alternative for "about"](https://github.com/date-fns/date-fns/pull/1893).
- [Improved string arguments warning after upgrading to v2](https://github.com/date-fns/date-fns/pull/1910).

### Added

- [Added Luxembourgish (lb) locale](https://github.com/date-fns/date-fns/pull/1900).

## [2.15.0] - 2020-07-17

Thanks to [@belgamo](https://github.com/belgamo), [@Matsuuu](https://github.com/Matsuuu), [@Imballinst](https://github.com/Imballinst), [@arsnyder16](https://github.com/arsnyder16), [@pankajupadhyay29](https://github.com/pankajupadhyay29), [@DCBN](https://github.com/DCBN), [@leedriscoll](https://github.com/leedriscoll), [@gottsohn](https://github.com/gottsohn), [@mukuljainx](https://github.com/mukuljainx) and [@dtriana](https://github.com/dtriana) for working on the release. Also kudos to [@KidkArolis](https://github.com/KidkArolis), [@imgx64](https://github.com/imgx64), [@fjc0k](https://github.com/fjc0k), [@wmonk](https://github.com/wmonk), [@djD-REK](https://github.com/djD-REK), [@dandv](https://github.com/dandv), [@psimk](https://github.com/psimk) and [@brimworks](https://github.com/brimworks) for improving the documentation.

### Fixed

- [Fixed behavior of `addBusinessDays` when input date is a weekend day](https://github.com/date-fns/date-fns/pull/1790).
- [Fixed `parseISO` not returning `Invalid Date` on incorrect string when there are spaces in it](https://github.com/date-fns/date-fns/pull/1791).
- [Fixed `es` round-tripping dates with Wednesday](https://github.com/date-fns/date-fns/pull/1792).
- [Fixed round-trip bug with `d`/`EEEE` ordering in tokens like `PPPPP`](https://github.com/date-fns/date-fns/pull/1795).
- [Fixed issues with parsing values in Japanese](https://github.com/date-fns/date-fns/pull/1807).
- [Fixed Hungarian breaking IE11](https://github.com/date-fns/date-fns/pull/1842).
- [Fixed Spanish accents in Saturday and Wednesday](https://github.com/date-fns/date-fns/pull/1872).

### Changed

- [Improved the message of protected tokens error](https://github.com/date-fns/date-fns/pull/1641).

### Added

- [Added Swiss-French `fr-CH` locale](https://github.com/date-fns/date-fns/pull/1809).
- [Added Flemish `nl-BE` locale](https://github.com/date-fns/date-fns/pull/1812).
- [Added Scottish Gaelic `gd` locale](https://github.com/date-fns/date-fns/pull/1832).
- [Added New Zealand English `en-NZ` locale](https://github.com/date-fns/date-fns/pull/1835).
- [Added `isMatch` function](https://github.com/date-fns/date-fns/pull/1868).

## [2.14.0] - 2020-05-18

Kudos to [@julamb](https://github.com/julamb), [@JacobSoderblom](https://github.com/JacobSoderblom), [@justingrant](http://github.com/justingrant), [@dragunoff](https://github.com/dragunoff), [@jmate0321](https://github.com/jmate0321), [@gbhasha](https://github.com/gbhasha), [@rasck](https://github.com/rasck), [@AlbertoPdRF](https://github.com/AlbertoPdRF), [@sebastianhaberey](https://github.com/sebastianhaberey) and [@giogonzo](https://github.com/giogonzo) for working on the release!

### Fixed

- [Fixed DST issues with `add`, `addDays` and `addMonths`](https://github.com/date-fns/date-fns/pull/1760).
- [Fixed "quarter" translation in the Bulgarian locale](https://github.com/date-fns/date-fns/pull/1763).
- [Fixed `formatDistance` strings in the Hungarian locale](https://github.com/date-fns/date-fns/pull/1765).
- [Fixed Danish month abbreviations](https://github.com/date-fns/date-fns/pull/1774).
- [Fixed parsing of mei in the Dutch locale](https://github.com/date-fns/date-fns/pull/1774).
- [Fixed missing preposition in `formatLong` in the Spanish locale](https://github.com/date-fns/date-fns/pull/1775).
- [Fixed `formatRelative` in the Italian locale](https://github.com/date-fns/date-fns/pull/1777).

### Added

- [Added `eachQuarterOfInterval`](https://github.com/date-fns/date-fns/pull/1715).
- [Added Basque (`eu`) locale](https://github.com/date-fns/date-fns/pull/1759).
- [Added Indian English (`en-IN`) locale](https://github.com/date-fns/date-fns/pull/1767).
- [Added `eachHourOfInterval`](https://github.com/date-fns/date-fns/pull/1776).

## [2.13.0] - 2020-05-06

Thanks to [@JorenVos](https://github.com/JorenVos), [@developergouli](https://github.com/developergouli), [@rhlowe](https://github.com/rhlowe) and [@justingrant](http://github.com/justingrant) for working on the release!

### Fixed

- [Fixed mei abbreviation in the Dutch locale](https://github.com/date-fns/date-fns/pull/1752).
- [Fixed `differenceInDays` DST behavior broken in 2.12.0](https://github.com/date-fns/date-fns/pull/1754).

### Added

- [Added Kannada locale support](https://github.com/date-fns/date-fns/pull/1747).
- [Added `formatISODuration` function](https://github.com/date-fns/date-fns/pull/1713).
- [Added `intervalToDuration` function](https://github.com/date-fns/date-fns/pull/1713).

## [2.12.0] - 2020-04-09

Kudos to [@leshakoss](http://github.com/leshakoss), [@skyuplam](https://github.com/skyuplam), [@so99ynoodles](https://github.com/so99ynoodles), [@dkozickis](https://github.com/dkozickis), [@belgamo](https://github.com/belgamo), [@akgondber](https://github.com/akgondber), [@dcousens](https://github.com/dcousens) and [@BoomDev](https://github.com/BoomDev) for working on the release!

### Fixed

- [Fixed minulý štvrtok in Slovak locale](https://github.com/date-fns/date-fns/pull/1701).
- Fixed date ordinalNumber for [ja/zh-CN/zh-TW](https://github.com/date-fns/date-fns/pull/1690) and [ko](https://github.com/date-fns/date-fns/pull/1696).
- [Fixed quarters parsing](https://github.com/date-fns/date-fns/pull/1694).
- [Fixed `setDay` with `weekStartsOn` != 0](https://github.com/date-fns/date-fns/pull/1639).
- [Fixed differenceInDays across DST](https://github.com/date-fns/date-fns/pull/1630).
- [Fixed required arguments exception message](https://github.com/date-fns/date-fns/pull/1674).

### Added

- [Added new function `formatDistanceToNowStrict`](https://github.com/date-fns/date-fns/pull/1679).

## [2.11.1] - 2020-03-26

### Fixed

- Rebuilt TypeScript and flow types.

## [2.11.0] - 2020-03-13

Kudos to [@oakhan3](https://github.com/oakhan3), [@Mukhammadali](https://github.com/Mukhammadali), [@altrim](https://github.com/altrim), [@leepowellcouk](https://github.com/leepowellcouk), [@amatzon](@https://github.com/amatzon), [@bryanMt](https://github.com/bryanMt), [@kalekseev](https://github.com/kalekseev), [@eugene-platov](https://github.com/eugene-platov) and [@tjrobinson](https://github.com/tjrobinson) for working on the release.

### Fixed

- [Fixed a bug in `differenceInYears` causing incorrect results when the left date is a leap day](https://github.com/date-fns/date-fns/pull/1654).
- [Fixed `parseISO` to work correctly around time shift dates](https://github.com/date-fns/date-fns/pull/1667).
- [Fixed `format` to work correctly with GMT-0752/GMT-0456 and similar timezones](https://github.com/date-fns/date-fns/pull/1666).

### Changed

- [Changed `getDay` typings to return `0|1|2|3|4|5|6` instead of `number`](https://github.com/date-fns/date-fns/pull/1668).
- [Improved Chinese locale](https://github.com/date-fns/date-fns/pull/1664):
  - Change date format to meet the national standard (GB/T 7408-2005).
  - Improve `ordinalNumber` function behavior.
  - Add prefix in `formatRelative` depending on if it's a current week or not.

### Added

- [Added Uzbek `uz` locale](https://github.com/date-fns/date-fns/pull/1648).
- [Updated Macedonian locale for v2](https://github.com/date-fns/date-fns/pull/1649).
- [Added Maltese `mt` locale](https://github.com/date-fns/date-fns/pull/1658).

## [2.10.0] - 2020-02-25

### Fixed

- [Fixed `formatISO` when formatting time with timezones with minute offsets > 0](https://github.com/date-fns/date-fns/pull/1599). Kudos to [@dcRUSTy](https://github.com/dcRUSTy).

### Fixed

- Fixed a bug in setDay when using weekStartsOn that is not 0

### Added

- [Added `weeks` to `Duration`](https://github.com/date-fns/date-fns/pull/1592).
- [Added `weeks` support to `add` and `sub`](https://github.com/date-fns/date-fns/pull/1592).
- [Added details message in `throwProtectedError`](https://github.com/date-fns/date-fns/pull/1592).

## [2.9.0] - 2020-01-08

Thanks to [@mborgbrant](https://github.com/mborgbrant), [@saintplay](https://github.com/saintplay), [@mrenty](https://github.com/mrenty), [@kibertoad](https://github.com/kibertoad), [@levibuzolic](https://github.com/levibuzolic), [@Anshuman71](https://github.com/Anshuman71), [@talgautb](https://github.com/talgautb), [@filipjuza](https://github.com/filipjuza), [@tobyzerner](https://github.com/tobyzerner), [@emil9453](https://github.com/emil9453), [@fintara](https://github.com/fintara), [@pascaliske](https://github.com/pascaliske), [@rramiachraf](https://github.com/rramiachraf), [@marnusw](https://github.com/marnusw) and [@Imballinst](https://github.com/Imballinst) for working on the release.

### Fixed

- [Fixed a bug with addBusinessDays returning the Tuesday when adding 1 day on weekends. Now it returns the Monday](https://github.com/date-fns/date-fns/pull/1588).
- [Added missing timezone to `formatISO`](https://github.com/date-fns/date-fns/pull/1576).
- [Removed dots from short day period names in the Kazakh locale](https://github.com/date-fns/date-fns/pull/1512).
- [Fixed typo in formatDistance in the Czech locale](https://github.com/date-fns/date-fns/pull/1540).
- [Fixed shortenings in the Bulgarian locale](https://github.com/date-fns/date-fns/pull/1560).
- [Fixed regex for the May in the Portuguese locale](https://github.com/date-fns/date-fns/pull/1565).

### Added

- [Added `eachMonthOfInterval` and `eachYearOfInterval`](https://github.com/date-fns/date-fns/pull/618).
- [Added `inclusive` option to `areIntervalsOverlapping](https://github.com/date-fns/date-fns/pull/643).
- [Added `isExists` function that checks if the given date is exists](https://github.com/date-fns/date-fns/pull/682).
- [Added `add` function to add seconds, minutes, hours, weeks, years in single call](https://github.com/date-fns/date-fns/pull/1581).
- [Added `sub` function, the opposite of `add`](https://github.com/date-fns/date-fns/pull/1583).
- [Added `Duration` type used in `add` and `sub`](https://github.com/date-fns/date-fns/pull/1583).
- [Added Azerbaijani (az) locale](https://github.com/date-fns/date-fns/pull/1547).
- [Added Moroccan Arabic (ar-MA) locale](https://github.com/date-fns/date-fns/pull/1578).

### Changed

- [Reduced the total minified build size by 1Kb/4%](https://github.com/date-fns/date-fns/pull/1563).
- [Made all properties in `Locale` type optional](https://github.com/date-fns/date-fns/pull/1542).
- [Added missing properties to `Locale` type](https://github.com/date-fns/date-fns/pull/1542).
- [Add the locale code to `Locale` type](https://github.com/date-fns/date-fns/pull/1580).
- [Added support of space time separator to `parseJSON`](https://github.com/date-fns/date-fns/pull/1579).
- [Allowed up to 7 digits in milliseconds in `parseJSON`](https://github.com/date-fns/date-fns/pull/1579).

## [2.8.1] - 2019-11-22

Thanks to [@Imballinst](https://github.com/Imballinst) for the bug fix!

### Fixed

- [Add colon between the hour and minutes for `formatRFC3339`](https://github.com/date-fns/date-fns/pull/1549). [See #1548](https://github.com/date-fns/date-fns/issues/1548).

## [2.8.0] - 2019-11-19

Kudos to [@NaridaL](https://github.com/NaridaL), [@Zyten](https://github.com/Zyten), [@Imballinst](https://github.com/Imballinst), [@leshakoss](https://github.com/leshakoss) and [@Neorth](https://github.com/Neorth) for working on the release.

### Fixed

- [Remove the next week preposition in the Swedish locale](https://github.com/date-fns/date-fns/pull/1538).

### Added

- [Added Malay (ms) locale](https://github.com/date-fns/date-fns/pull/1537).
- [Added `formatISO`, `formatISO9075`, `formatRFC3339`, and `formatRFC7231` functions](https://github.com/date-fns/date-fns/pull/1536).

## [2.7.0] - 2019-11-07

Thanks to [@mzgajner](https://github.com/mzgajner), [@NaridaL](https://github.com/NaridaL), [@Zyten](https://github.com/Zyten), [@leshakoss](https://github.com/leshakoss), [@fintara](https://github.com/fintara), [@kpr-hellofresh](https://github.com/kpr-hellofresh) for contributing to the release.

### Fixed

- [Fixed a mistake in the Slovenian locale](https://github.com/date-fns/date-fns/pull/1529).
- [Fixed incorrect behavior of `parseISO` in Firefox caused by differences in `getTimezoneOffset`](https://github.co