| 1234567891011121314151617 | "use strict";var getMonth = Date.prototype.getMonth;module.exports = function () {	switch (getMonth.call(this)) {	case 1:		return this.getFullYear() % 4 ? 28 : 29;	case 3:	case 5:	case 8:	case 10:		return 30;	default:		return 31;	}};
 |