Retrieve the last day of the year in javascript

Question

Today it's 06/11/2012. I need retrieve the last day of the current year using javascript.

function getLastDayOfYear(date)
{
    var x = document.getElementById("demo");

    var year = date.getFullYear();
    var month = date.getMonth();
    var day = 0; // ?????

    x.innerHTML = day + "-" + month + "-" + year;
}

Is there any function that retrieve it done, or must i do a full implementation? If i need to implement this, could anyone help me out ?

I made a simple fiddle you can check here: http://jsfiddle.net/EyzCD/

the last day of the year is always December 31. Why would you need to calculate that? — Jason, Nov 06 '12 at 16:20
Well, the world is ending in 2012, as we all know, so he needs to get the last day of the year from the Mayan calendar. — aquinas, Nov 06 '12 at 16:22
You will find the answer [here][1] on the stackoverflow. [1]: http://stackoverflow.com/questions/222309/calculate-last-day-of-month-in-javascript — Rikki, Nov 06 '12 at 16:23
@sp00m: We've pretty much got the [calendar figured out](http://en.wikipedia.org/wiki/Gregorian_calendar) at this point; I very much doubt that we'll change the length of December. — josh3736, Nov 06 '12 at 16:25
hehe, check this: http://davidlongstreet.wordpress.com/2009/05/19/dont-drink-and-code/ — Remco Ros, Nov 06 '12 at 16:30

score 80 · Accepted Answer · answered Nov 06 '12 at 16:20

80

Since the last day of a year is always December 31, it's easy:

new Date(new Date().getFullYear(), 11, 31)

answered Nov 06 '12 at 16:20

josh3736

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score 8 · Answer 2 · answered Nov 06 '12 at 16:35

8

In case that someday the last day of the year changes, could be useful to use a temporary date with the first day on the next month and then return to the previous date

tmp_date = new Date(2012, 12, 1)
last_day = new Date(tmp_date - 1)

answered Nov 06 '12 at 16:35

Mayerson

101
1
8

1

Alternatively: `last_day = new Date(new Date(2012, 12, 1) - 1)` – Joshua Dwire Nov 06 '12 at 16:55

score 2 · Answer 3 · answered Mar 11 '20 at 11:15

This will return Last day of Year

var actualDate = new Date()
var eoYear = new Date(actualDate.getFullYear(),12,0)

In case if you need to return Last second of the year

var actualDate = new Date()
var eoYear = new Date(actualDate.getFullYear(),12,0,23,59,59)

score 1 · Answer 4 · answered Nov 06 '12 at 16:25

1

alert(new Date(2012, 12, 0));

will return

Mon Dec 31 00:00:00 CST 20102

answered Nov 06 '12 at 16:25

Rikki

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If you pass 11 it will return the Nov month. :) try it. It's the reason why I passed the zero value as the third parameter. Cheers – Rikki Nov 06 '12 at 16:45

score 1 · Answer 5 · edited Nov 06 '12 at 16:43

1

Will this do it for you? This will return the Whole lot for you to pick from.

function LastDayOfMonth(Year, Month) {
   return new Date( (new Date(Year, Month,1))-1 );
}

edited Nov 06 '12 at 16:43

josh3736

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answered Nov 06 '12 at 16:26

Magnus Karlsson

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score 0 · Answer 6 · answered Nov 06 '12 at 16:28

0

I think OP wants to get last day of the month.

try:

var tmp = new Date(year, month+1, 1);
var days = new Date(tmp-1).getDate();

answered Nov 06 '12 at 16:28

Remco Ros

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Retrieve the last day of the year in javascript

6 Answers6