kazulog@sv1:~$ timedatectl list-timezones | wc -l
485
kazulog@sv1:~$ timedatectl list-timezones | grep Tokyo
Asia/Tokyo
kazulog@sv1:~$ timedatectl list-timezones | grep '^America/New' 
America/New_York
kazulog@sv1:~$ timedatectl list-timezones | head -5
Africa/Abidjan
Africa/Accra
Africa/Addis_Ababa
Africa/Algiers
Africa/Asmara