What are some common pitfalls when using timestamps in PHP for date manipulation?

One common pitfall when using timestamps in PHP for date manipulation is not considering time zones, which can lead to incorrect date calculations. To solve this, always set the correct time zone before working with timestamps.

// Set the default time zone
date_default_timezone_set('America/New_York');

// Get the current timestamp
$currentTimestamp = time();

// Manipulate the date using the correct time zone
$newDate = date('Y-m-d H:i:s', strtotime('+1 day', $currentTimestamp));

echo $newDate;