getUTCDay() method returns the day of the week in the
specified date according to universal time, where 0 represents Sunday.
An integer number corresponding to the day of the week for the given date, according to universal time: 0 for Sunday, 1 for Monday, 2 for Tuesday, and so on.
The following example assigns the weekday portion of the current date to the variable
var today = new Date(); var weekday = today.getUTCDay();
The definition of 'Date.prototype.getUTCDay' in that specification.
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