Whit this code:
$epoch= '1609455600'; $date = new DateTime( '@'.$epoch); echo $date-> format( 'Y-m-d');
I see this result
2020-12-31. The server timezone is reported as Europe/Zurich (with
date_default_timezone_get). But in this time zone that date should be 2021-1-1.
What is going on here?
In addition to the comment from @tuckbros. The output with var_export shows that the DateTime object has the time zone 00:00 (UTC).
date_default_timezone_set('Europe/Zurich'); $epoch= '1609455600'; $date = new DateTime( '@'.$epoch); var_export($date); /* DateTime::__set_state(array( 'date' => '2020-12-31 23:00:00.000000', 'timezone_type' => 1, 'timezone' => '+00:00', )) */
The clean way to get the local time is to transfer the object to the desired time zone (and not to add any offset times).
$date->setTimeZone(new DateTimeZone(date_default_timezone_get())); var_export($date); /* DateTime::__set_state(array( 'date' => '2021-01-01 00:00:00.000000', 'timezone_type' => 3, 'timezone' => 'Europe/Zurich', )) */
You can now continue to work with the DateTime object, since it has the correct time zone in addition to the correct local time.
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