'use strict'; var mod = require('../helpers/mod'); // https://ecma-international.org/ecma-262/5.1/#sec-15.9.1.3 module.exports = function DaysInYear(y) { if (mod(y, 4) !== 0) { return 365; } if (mod(y, 100) !== 0) { return 366; } if (mod(y, 400) !== 0) { return 365; } return 366; };