When calculating time differences in PHP, what considerations should be made for scenarios like daylight saving time changes?

When calculating time differences in PHP, it's important to consider scenarios like daylight saving time changes. One way to handle this is by using the DateTime class, which takes into account timezones and DST changes automatically. By setting the timezones correctly and using DateTime objects, you can accurately calculate time differences even when DST changes occur.

$timezone = new DateTimeZone('America/New_York');
$date1 = new DateTime('2022-03-12 00:00:00', $timezone);
$date2 = new DateTime('2022-03-13 00:00:00', $timezone);

$interval = $date1->diff($date2);

echo $interval->format('%R%a days %H hours %I minutes');