What are the potential pitfalls of using the DD.MM.YYYY date format in PHP for date calculations?

Using the DD.MM.YYYY date format in PHP for date calculations can lead to errors because PHP's date functions expect dates in the format of YYYY-MM-DD. To avoid issues, you should convert the DD.MM.YYYY format to YYYY-MM-DD before performing any date calculations. 

$date = '25.12.2022';
$converted_date = date('Y-m-d', strtotime(str_replace('.', '-', $date)));
echo $converted_date;

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date format DD.MM.YYYY PHP date calculations potential pitfalls

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