Fast and compact way to get the weekday by date (year, month and day) in pure javascript

weekdayByDate.js

/**
 * A pure function that retrieves the day of the week of a given date.
 * Does not check if the date exists (i.e. 2019/02/31 yields a weekday, but doesn't exists).
 *
 * @param  {number} y  The year as a number with 4 digits
 * @param  {number} m  The month as a number between 0 and 11 (january to december)
 * @param  {number} d  The day as a number between 0 and 31
 * @return {number}    The number of the weekday, between 0 (monday) to 6 (sunday)
 */
function weekdayByDate(y, m, d) {
	return (((m < 3)?Math.ceil:Math.floor)(y*5/4)+d-(m==10?4:((0x940e9783>>(3*m-3))&7)))%7;
}