JavaScript: The Definitive Guide

24.35. Date.getUTCDay( ): return the day-of-the-week field of a Date (universal time)

ECMAScript v1

24.35.1. Synopsis

date.getUTCDay( )

24.35.1.1. Returns

The day of the week that results when date is expressed in universal time. Return values are between 0 (Sunday) and 6 (Saturday).