setUTCDate() method changes the day of the month of a given
Date instance, based on UTC time.
An integer from 1 to 31, representing the day of the month.
The number of milliseconds between 1 January 1970 00:00:00 UTC and the updated date.
dayValue is outside of the range of date values for the month,
setDate() will update the
Date object accordingly.
For example, if 0 is provided for
dayValue, the date will be set to the last day of the previous month. 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.
If a negative number is provided for
dayValue, the date will be set counting backwards from the last day of the previous month. -1 would result in the date being set to 1 day before the last day of the previous month.
const theBigDay = new Date(); theBigDay.setUTCDate(20);
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