The setUTCDate() method sets the day of the month for a specified date according to universal time.
dateObj.setUTCDate(dayValue)
dayValueIf a parameter you specify is outside of the expected range, setUTCDate() attempts to update the date information in the Date object accordingly. For example, if you use 40 for dayValue, and the month stored in the Date object is June, the day will be changed to 10 and the month will be incremented to July.
setUTCDate()var theBigDay = new Date(); theBigDay.setUTCDate(20);
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