It is not safe to rely on the system's timezone settings.

If you see this thrown at the E_STRICT level by PHP, then you need to let PHP know which timezone the server is currently running in, by either running the following function in PHP:

date_default_timezone_set('Europe/London');

… where Europe/London is a supported timezone or setting it in php.ini:

date.timezone = "Europe/London"
  • By: Andrew Kirkpatrick
  • In: PHP
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