What are best practices for converting time formats between PHP and JavaScript?

When converting time formats between PHP and JavaScript, it's important to ensure that both languages are using the same format to avoid any discrepancies. One common approach is to use Unix timestamps, which represent the number of seconds since January 1, 1970. This format is easily convertible between PHP and JavaScript, allowing for seamless communication between the two languages.

// PHP code to convert a date/time to Unix timestamp
$date = "2022-01-01 12:00:00";
$timestamp = strtotime($date);
echo $timestamp;