[Riim]

/**
	 * @param {Date|Number} birthDate
	 *
	 * @returns {Number}
	 */
	function birthDateToAge(birthDate) {
		birthDate = new Date(birthDate);

		var now = new Date(),
			age = now.getFullYear() - birthDate.getFullYear();

		return now.setFullYear(1972) < birthDate.setFullYear(1972) ? age - 1 : age;
	}