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