Hello
This is not related to the NOVATOR template. Europe/Istanbul is a valid PHP timezone, but MySQL/MariaDB is rejecting it because probably your hosting does not allow to set it.
In most cases this warning can be ignored, as it rarely causes serious issues. However, the proper fix is on the database server side. Ask your hosting provider/server admin to set MySQL timezone to match your php timezone.
This is not related to the NOVATOR template. Europe/Istanbul is a valid PHP timezone, but MySQL/MariaDB is rejecting it because probably your hosting does not allow to set it.
In most cases this warning can be ignored, as it rarely causes serious issues. However, the proper fix is on the database server side. Ask your hosting provider/server admin to set MySQL timezone to match your php timezone.
