PHP 5 >= 5.1.0, PHP 7, PHP 8
date_default_timezone_set - Sets the default timezone used by all date/time functions in a script
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date_default_timezone_set( string$timezoneId ): bool

date_default_timezone_set sets the default timezone used by all date/time functions.

Instead of using this function to set the default timezone in your script, you can also use the INI setting date.timezone to set the default timezone.



The timezone identifier, like UTC, Africa/Lagos, Asia/Hong_Kong, or Europe/Lisbon. The list of valid identifiers is available in the .

Return Values

This function returns false if the timezoneId isn't valid, or true otherwise.

Related Functions

Example of date_default_timezone_set

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Function date_default_timezone_set:

Date and Time Functions

Most used PHP functions