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