How can PHP developers ensure their code is compatible with 64-bit systems when working with dates?

When working with dates in PHP, developers should ensure that their code is compatible with 64-bit systems by using the DateTime class instead of the older date functions. The DateTime class provides better support for dates beyond the year 2038, which is a common issue on 32-bit systems. By using the DateTime class, developers can ensure their code will work seamlessly on both 32-bit and 64-bit systems.

$date = new DateTime('2022-12-31');
echo $date->format('Y-m-d');