Date is valid with Javascript

validation_date.js

/**
 * Get the number of days in any particular month
 * @link https://stackoverflow.com/a/1433119/1293256
 * @param  {integer} m The month (valid: 0-11)
 * @param  {integer} y The year
 * @return {integer}   The number of days in the month
 */
var daysInMonth = function (m, y) {
    switch (m) {
        case 1 :
            return (y % 4 == 0 && y % 100) || y % 400 == 0 ? 29 : 28;
        case 8 : case 3 : case 5 : case 10 :
            return 30;
        default :
            return 31
    }
};

/**
 * Check if a date is valid
 * @link https://stackoverflow.com/a/1433119/1293256
 * @param  {[type]}  d The day
 * @param  {[type]}  m The month
 * @param  {[type]}  y The year
 * @return {Boolean}   Returns true if valid
 */
var isValidDate = function (d, m, y) {
    m = parseInt(m, 10) - 1;
    return m >= 0 && m < 12 && d > 0 && d <= daysInMonth(m, y);
};