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/

## 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 compatability 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.com/date-fns/date-fns/pull/1495).

### Changed

- [Make object arguments types more elaborate in Flow type definitions](https://github.com/date-fns/date-fns/pull/1519).
- [Get rid of deprecated Function in Flow type definitions](https://github.com/date-fns/date-fns/pull/1520).
- [Allow `parseJSON` to accept strings without trailing 'Z' symbol and with up to 6 digits in the milliseconds' field](https://github.com/date-fns/date-fns/pull/1499).

### Added

- [Added Bulgarian (bg) locale](https://github.com/date-fns/date-fns/pull/1522).

## [2.6.0] - 2019-10-22

Kudos to [@marnusw](https://github.com/marnusw), [@cdrikd](https://github.com/cdrikd) and [@rogyvoje](https://github.com/rogyvoje) for working on the release!

### Added

- [Added `parseJSON` - lightweight function (just 411 B) that parses dates formatted with `toJSON`](https://github.com/date-fns/date-fns/pull/1463).
- [Added the language code to each locale](https://github.com/date-fns/date-fns/pull/1489).
- [Added `subBusinessDays` function](https://github.com/date-fns/date-fns/pull/1491).
- [Added both Serbian - cyrillic (sr) and latin (sr-Latn) locales](https://github.com/date-fns/date-fns/pull/1494).

## [2.5.1] - 2019-10-18

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

### Fixed

- [Fixed infinite loop in `addBusinessDays`](https://github.com/date-fns/date-fns/pull/1486).

## [2.5.0] - 2019-10-16

Kudos to [@dkozickis](https://github.com/dkozickis), [@drugoi](https://github.com/drugoi), [@kranthilakum](https://github.com/kranthilakum), [@102](https://github.com/102), [@gpetrioli](https://github.com/gpetrioli) and [@JulienMalige](https://github.com/JulienMalige) for making the release happen.

### Fixed

- [Fixed compatibility with IE11 by removing `findIndex` from the code](https://github.com/date-fns/date-fns/pull/1457).
- [Fixed Greek locale patterns](https://github.com/date-fns/date-fns/pull/1480).

### Added

- [Added Kazakh (kk) locale](https://github.com/date-fns/date-fns/pull/1460).
- [Added Telugu (te) locale](https://github.com/date-fns/date-fns/pull/1464).
- [Added Canadian French (fr-CA) locale](https://github.com/date-fns/date-fns/issues/1465).
- [Added Australian English (en-AU) locale](https://github.com/date-fns/date-fns/pull/1470).
- [Exported `Interval` and `Locale` types from Flow typings](https://github.com/date-fns/date-fns/pull/1475).

## [2.4.1] - 2019-09-28

Thanks to [@mrclayman](https://github.com/mrclayman) for reporting the issue and [@leshakoss](https://github.com/leshakoss) for fixing it.

### Fixed

- [Fixed am/pm mixup in the Czech locale](https://github.com/date-fns/date-fns/pull/1453).

## [2.4.0] - 2019-09-27

This release is brought to you by these amazing people: [@lovelovedokidoki](https://github.com/lovelovedokidoki), [@alexigityan](https://github.com/alexigityan), [@kalekseev](https://github.com/kalekseev) and [@andybangs](https://github.com/andybangs). You rock!

### Fixed

- [Fixed Vietnamese parsing patterns](https://github.com/date-fns/date-fns/pull/1445).
- [Fixed Czech parsing regexes](https://github.com/date-fns/date-fns/pull/1446).
- [Fixed offset for Eastern Hemisphere in `parseISO`](https://github.com/date-fns/date-fns/pull/1450).

### Added

- [Added Armenian locale support](https://github.com/date-fns/date-fns/pull/1448).

## [2.3.0] - 2019-09-24

Huge thanks to [@lovelovedokidoki](https://github.com/lovelovedokidoki) who improved 8 (!) locales in an unstoppable open-source rampage and [@VesterDe](https://github.com/VesterDe) for fixing Slovenian locale 👏

### Fixed

- [Fixed the translation of "yesterday" in the Slovenian locale](https://github.com/date-fns/date-fns/pull/1420).
- [Fixed French parsing issues with June and August](https://github.com/date-fns/date-fns/pull/1430).
- [Improved Turkish parsing](https://github.com/date-fns/date-fns/pull/1432).
- [Fixed "March