What is the main issue the user is facing with PHP date and time calculations in this forum thread?

The main issue the user is facing with PHP date and time calculations in this forum thread is that they are trying to calculate the difference between two dates in days, but the result is not accurate due to timezones affecting the calculation. To solve this issue, the user should convert both dates to a common timezone before calculating the difference. 

$date1 = new DateTime('2022-01-01', new DateTimeZone('UTC'));
$date2 = new DateTime('2022-01-10', new DateTimeZone('UTC'));

$date1->setTimezone(new DateTimeZone('America/New_York'));
$date2->setTimezone(new DateTimeZone('America/New_York'));

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

Keywords

DateTime timezone daylight saving time strtotime formatting

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