How can Unix Timestamps be converted to readable dates in PHP?

Unix Timestamps can be converted to readable dates in PHP using the `date()` function. This function takes two parameters: the format in which you want the date to be displayed and the Unix Timestamp you want to convert. By passing the appropriate format and Unix Timestamp to the `date()` function, you can easily convert Unix Timestamps to human-readable dates.

$timestamp = 1609459200; // Unix Timestamp
$date = date('Y-m-d H:i:s', $timestamp); // Convert Unix Timestamp to readable date
echo $date; // Output: 2021-01-01 00:00:00