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SHDate.setDate()

The setDate() method changes the day of the month of a given Date instance, based on local time.

To instead change the day of the month for a given Date instance based on UTC time, use the setUTCDate() method.

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Syntax

setDate(dayValue);

Parameters

dayValue An integer representing the day of the month.

Return value

The number of milliseconds between 25 Dey 1390 00:00:00 UTC and the given date (the Date object is also changed in place).

Description

If the 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 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.

Examples

Using setDate()

const theBigDay = new SHDate(1962, 6, 7, 12); // noon of 1962-07-07 (7th of July 1962, month is 0-indexed)
const theBigDay2 = new SHDate(theBigDay).setDate(24); // 1962-07-24 (24th of July 1962)
const theBigDay3 = new SHDate(theBigDay).setDate(32); // 1962-08-01 (1st of August 1962)
const theBigDay4 = new SHDate(theBigDay).setDate(22); // 1962-07-22 (22nd of July 1962)
const theBigDay5 = new SHDate(theBigDay).setDate(0); // 1962-06-30 (30th of June 1962)
const theBigDay6 = new SHDate(theBigDay).setDate(98); // 1962-10-06 (6th of October 1962)
const theBigDay7 = new SHDate(theBigDay).setDate(-50); // 1962-05-11 (11th of May 1962)

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date/setDate