Having issues with timezone

[Raphaelokugeln]

Hi living in Austria we have summer and wintertime and my fullpage os is wrong by an hour i tried to fix it but got stuck. Where can I change the zone to Vienna or something like that? Thanks for your help

[Mironight]

Hi I know I'm a bit late and I don't know what you tired before, but you can change the timezone with sudo dpkg-reconfigure tzdata