Generate random dates within a range

randomDates.js

/**
 * Generate a random date between now and one year from now
 * With a time between 7am and 8pm
 * Minutes on the full hour :00
 * @returns {Date}
 */
function randomDate() {
	var start = new Date();
	var end = new Date(new Date().setFullYear(start.getFullYear() + 1));
	var date = new Date(start.getTime() + Math.random() * (end.getTime() - start.getTime()));
	var hour = 7 + Math.random() * (20 - 7) | 0;

	date.setHours(hour);
	date.setMinutes(0);

	return date;
}

/**
 * Generate a random date between a start and end date
 * Set a start and end hour
 * @param startDate {Date}
 * @param endDate {Date}
 * @param startHour {Integer} 0-23
 * @param endHour {Integer} 0-23
 * @returns {Date}
 */
function randomDate(startDate, endDate, startHour, endHour) {
	var date = new Date(startDate.getTime() + Math.random() * (endDate.getTime() - startDate.getTime()));
	var hour = startHour + Math.random() * (endHour - startHour) | 0;

	date.setHours(hour);
	date.setMinutes(0);

	return date;
}