Zon masa dan singkatan
Orang-orang menaip singkatan seperti mereka menaip nama bandar, jadi setiap satu mendapat halaman dengan jam hidup. Yang ambigu (IST bermakna tiga perkara yang berbeza 4½ jam berlainan, CST bermakna tiga perkara 14 jam berlainan) kata begitu di atas daripada memilih satu secara senyap.
Pengekodan
| Kod | Nama | Sekarang | Ofset | |
|---|---|---|---|---|
| UTC | Coordinated Universal Time | 12:34 am | UTC+0 | |
| GMT | Greenwich Mean Time | 12:34 am | UTC+0 | ambigu |
| EST | Eastern Standard Time | 8:34 pm | UTC-4 | ambigu |
| EDT | Eastern Daylight Time | 8:34 pm | UTC-4 | |
| CST | Central Standard Time | 7:34 pm | UTC-5 | ambigu |
| CDT | Central Daylight Time | 7:34 pm | UTC-5 | |
| MST | Mountain Standard Time | 6:34 pm | UTC-6 | ambigu |
| MDT | Mountain Daylight Time | 6:34 pm | UTC-6 | |
| PST | Pacific Standard Time | 5:34 pm | UTC-7 | ambigu |
| PDT | Pacific Daylight Time | 5:34 pm | UTC-7 | |
| AKST | Alaska Standard Time | 4:34 pm | UTC-8 | |
| HST | Hawaii-Aleutian Standard Time | 2:34 pm | UTC-10 | |
| AST | Atlantic / Arabia Standard Time | 9:34 pm | UTC-3 | ambigu |
| NST | Newfoundland Standard Time | 10:04 pm | UTC-2:30 | |
| BST | British Summer Time | 1:34 am | UTC+1 | ambigu |
| WET | Western European Time | 1:34 am | UTC+1 | |
| CET | Central European Time | 2:34 am | UTC+2 | |
| CEST | Central European Summer Time | 2:34 am | UTC+2 | |
| EET | Eastern European Time | 3:34 am | UTC+3 | |
| EEST | Eastern European Summer Time | 3:34 am | UTC+3 | |
| MSK | Moscow Time | 3:34 am | UTC+3 | |
| TRT | Turkey Time | 3:34 am | UTC+3 | |
| IRST | Iran Standard Time | 4:04 am | UTC+3:30 | |
| GST | Gulf Standard Time | 4:34 am | UTC+4 | |
| PKT | Pakistan Standard Time | 5:34 am | UTC+5 | |
| IST | India / Irish / Israel Standard Time | 6:04 am | UTC+5:30 | ambigu |
| NPT | Nepal Time | 6:19 am | UTC+5:45 | |
| ICT | Indochina Time | 7:34 am | UTC+7 | |
| WIB | Western Indonesian Time | 7:34 am | UTC+7 | |
| SGT | Singapore Time | 8:34 am | UTC+8 | |
| MYT | Malaysia Time | 8:34 am | UTC+8 | |
| HKT | Hong Kong Time | 8:34 am | UTC+8 | |
| PHT | Philippine Time | 8:34 am | UTC+8 | |
| JST | Japan Standard Time | 9:34 am | UTC+9 | |
| KST | Korea Standard Time | 9:34 am | UTC+9 | |
| AWST | Australian Western Standard Time | 8:34 am | UTC+8 | |
| ACST | Australian Central Standard Time | 10:04 am | UTC+9:30 | |
| AEST | Australian Eastern Standard Time | 10:34 am | UTC+10 | |
| AEDT | Australian Eastern Daylight Time | 10:34 am | UTC+10 | |
| NZST | New Zealand Standard Time | 1:34 pm | UTC+13 | |
| NZDT | New Zealand Daylight Time | 1:34 pm | UTC+13 | |
| CHST | Chamorro Standard Time | 10:34 am | UTC+10 | |
| SAST | South Africa Standard Time | 2:34 am | UTC+2 | |
| EAT | East Africa Time | 3:34 am | UTC+3 | |
| CAT | Central Africa Time | 2:34 am | UTC+2 | |
| WAT | West Africa Time | 1:34 am | UTC+1 | |
| BRT | Brasília Time | 9:34 pm | UTC-3 | |
| ART | Argentina Time | 9:34 pm | UTC-3 | |
| CLT | Chile Standard Time | 9:34 pm | UTC-3 | |
| COT | Colombia Time | 7:34 pm | UTC-5 | |
| PET | Peru Time | 7:34 pm | UTC-5 | |
| VET | Venezuela Time | 8:34 pm | UTC-4 |
Ofset GMT dan UTC
Ofset tetap tidak pernah berpindah untuk waktu musim panas, tetapi tempat duduk padanya berubah dua kali setahun, jadi setiap halaman mengira semula senarainya secara langsung.
Amerika Syarikat, negara mengikut negara
Termasuk yang paling sukar: Arizona tidak mengubah jamnya, Indiana baru mula pada tahun 2006, dan lima negara dipotong menjadi dua oleh sempadan zon.
Jam yang mengabaikan zon masa sepenuhnya
Dua percubaan hari tanpa mereka, satu dari tahun 1793, satu dari tahun 1998, kedua-duanya membagi hari dengan ribuan dan kedua-duanya hidup di sini.