_           _                 
 | |_ ___  __| |____  ___ _   _ 
 | __/ _ \/ _` |_  / / _ \ | | |
 | ||  __/ (_| |/ / |  __/ |_| |
  \__\___|\__,_/___(_)___|\__,_|

Set timezone at command line in Debian Live

To list timezones:

timedatectl list-timezones

To set the timezone to Europe/Dublin:

sudo timedatectl set-timezone Europe/Dublin

To set the timezone to Europe/Athens:

sudo timedatectl set-timezone Europe/Athens

To set the timezone to Atlantic/Azores (UTC -01:00)

sudo timedatectl set-timezone Atlantic/Azores