In what scenarios could issues arise with date calculations in PHP, such as during leap years or daylight savings time changes?

Issues with date calculations in PHP can arise during leap years and daylight savings time changes. To handle leap years, you can use the `DateTime` class in PHP which automatically adjusts for leap years. For daylight savings time changes, you should use the appropriate timezone when working with dates to ensure accurate calculations. 

// Example of handling leap years using DateTime class
$date = new DateTime('2024-02-29');
echo $date->format('Y-m-d'); // Output: 2024-02-29

// Example of handling daylight savings time changes with timezone
$date = new DateTime('2022-03-13', new DateTimeZone('America/New_York'));
echo $date->format('Y-m-d H:i:sP'); // Output: 2022-03-13 00:00:00-04:00

Keywords

date calculations PHP leap years daylight savings time issues

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