- var isDate = require('../lang/isDate');
- /**
- * checks if it's a leap year
- */
- function isLeapYear(fullYear){
- if (isDate(fullYear)) {
- fullYear = fullYear.getFullYear();
- }
- return fullYear % 400 === 0 || (fullYear % 100 !== 0 && fullYear % 4 === 0);
- }
- module.exports = isLeapYear;
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