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25 lines
604 B
25 lines
604 B
6 years ago
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var parse = require('../parse/index.js')
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/**
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* @category Year Helpers
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* @summary Is the given date in the leap year?
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*
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* @description
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* Is the given date in the leap year?
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*
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* @param {Date|String|Number} date - the date to check
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* @returns {Boolean} the date is in the leap year
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*
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* @example
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* // Is 1 September 2012 in the leap year?
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* var result = isLeapYear(new Date(2012, 8, 1))
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* //=> true
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*/
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function isLeapYear (dirtyDate) {
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var date = parse(dirtyDate)
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var year = date.getFullYear()
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return year % 400 === 0 || year % 4 === 0 && year % 100 !== 0
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}
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module.exports = isLeapYear
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