Update Timezone Data

Check Current TZ Data

timedatectl

Update TZ

timedatectl set-timezone America/Phoenix

List TZ

timedatectl list-timezones

Search For TZ in Specific Area

timedatectl list-timezones | grep America

Search For Specific TZ

timedatectl list-timezones | grep Phoenix

TZ Data is Stored Here (Debian)

ls /usr/share/zoneinfo