The output of date()
depends on the configured time zone. If you add the time and timezone, you can see it. In my case it is CET:
echo date('d/m/Y H:m:i T', -243219600);
//prints: 18/04/1962 00:04:00 CET
Solution with date()
If you want date()
to use UTC
, use date_default_timezone_set
:
date_default_timezone_set('UTC');
echo date('d/m/Y H:m:i T', -243219600);"
Output
17/04/1962 23:04:00 UTC
(you see, since it is one hour before midnight in UTC, the date depends on the timezone)
Solution with DateTime
:
The DateTime
class uses always UTC if it is constructed by a Unix timestamp:
From the documentation:
Note:
The $timezone
parameter and the current timezone are ignored when the $time
parameter either is a UNIX timestamp (e.g. @946684800) or specifies a timezone (e.g. 2010-01-28T15:00:00+02:00).
So you can use the following code as well:
echo (new DateTime('@-243219600'))->format('d/m/Y');