rpg-calendar/build/module/lib/leapYear.js

Low level library for working with RPG/Fantasy dates

export const isLeapYearBuilder = (interval, hasYear0 = false) => (year) => {
    if (!hasYear0 && year === 0) {
        throw new Error('Invalid year');
    }
    // Every <interval> years after the first year there is a leap year
    return year % interval === 0;
};
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