Comments on: Calculate Date from day of year in PhP

By: Cesar Perales

Cesar Perales — Fri, 09 Sep 2011 18:33:29 +0000

actually the correct function will be

function dayofyear2date( $tDay, $tFormat = 'd-m-Y' ) {
$date = mktime( 0, 0, 0, 1, $tDay+1, date('Y') );
return date( $tFormat, $date );
}

$todayid = date("z"); // to get today's day of year
echo dayofyear2date($todayid);

Beacuse date('z') starts from 0 and mktime count the number of days from 1

By: Roland

Roland — Sun, 28 Aug 2011 20:15:48 +0000

Thx

By: Garison

Garison — Thu, 12 May 2011 02:40:33 +0000

Actually, the right right code would be:

function dayofyear2date( $tDay, $tFormat = 'd-m-Y' ) {
$date = mktime( 0, 0, 0, 1, $tDay, date('Y') );
return date( $tFormat, $date );
}

$todayid = date("z"); // to get today's day of year
echo dayofyear2date($todayid);

By: Proger_XP

Proger_XP — Sat, 09 Apr 2011 10:41:37 +0000

Things are even more simple:

function DayToTimestamp($day, $year = null) {
isset($year) or $year = date('Y');
return strtotime("1 Jan $year +$day day");
}

By: cristian

cristian — Wed, 10 Nov 2010 18:40:26 +0000

I could have never figured it out (within 2 or 3 weeks!!), thank you!

By: Süha Kozbey

Süha Kozbey — Fri, 15 Oct 2010 14:56:18 +0000

Thank you very much, I could'nt find an alternative to your function.. you really saved my time..

By: Theo van der Sluijs

Theo van der Sluijs — Thu, 03 Jun 2010 17:47:36 +0000

Thanks Christian, this new code looks great.

By: Christian Sciberras

Christian Sciberras — Thu, 03 Jun 2010 13:15:42 +0000

Oh, and the right code would be:

function dayofyear2date( $tDay, $tFormat = 'd-m-Y' ) {

$offset = intval($tDay) * 86400;

$date = mktime( 0, 0, 0, 1, 1, date('Y') )+$offset;

return date( $tFormat, $date );

}

$todayid = date("z"); // to get today's day of year

echo dayofyear2date($todayid);

By: deb

deb — Sun, 13 Sep 2009 19:44:27 +0000

Thank you ever so much! I was trying to avoid having to recode daily content with a datestamp! This will do the trick nicely without tons of typing. You rock!!

By: JMP

JMP — Mon, 13 Jul 2009 13:22:48 +0000

I needed it for a gantt chart I am (attempting) to develop in Flex. Works great. Thanks