| Kolkata Tiruchendur | India Standard Time | 00:00 |
| Kolkata Chuo | Japan Time | -03:30 |
| Kolkata Wareham | Eastern Time | 09:30 |
| Kolkata Tirukazhukundram | India Standard Time | 00:00 |
| Kolkata Warburton | Eastern Australia Time | -05:30 |
| Kolkata Tirumakudalu Narasipura | India Standard Time | 00:00 |
| Kolkata Warner | Eastern Time | 09:30 |
| Kolkata Tahoe City | Pacific Time | 12:30 |
| Kolkata Zanzibar Town | East Africa Time | 02:30 |
| Kolkata Tagaytay | Philippine Time | -02:30 |
| Kolkata Tägerwilen | Central European Time | 03:30 |
| Kolkata Taipa | China Time | -02:30 |
| Kolkata Taito | Japan Time | -03:30 |
| Kolkata Taitō-ku | Japan Time | -03:30 |
| Kolkata Taizhou | China Time | -02:30 |
| Kolkata Takengon | Western Indonesia Time | -01:30 |
| Kolkata Zuidhorn | Central European Time | 03:30 |
| Kolkata Zuidoostbeemster | Central European Time | 03:30 |
| Kolkata Zugliano | Central European Time | 03:30 |
| Kolkata Zürs | Central European Time | 03:30 |
| Kolkata Zweisimmen | Central European Time | 03:30 |
| Kolkata Zwingenberg | Central European Time | 03:30 |
| Kolkata Zwiefalten | Central European Time | 03:30 |
| Kolkata Wynn Vale | Central Australia Time | -05:00 |
| Kolkata Wynnewood | Eastern Time | 09:30 |
| Kolkata Wynyard | Eastern Australia Time | -05:30 |
| Kolkata Woy Woy | Eastern Australia Time | -05:30 |
| Kolkata Zoutelande | Central European Time | 03:30 |
| Kolkata Wyomissing | Eastern Time | 09:30 |
| Kolkata Wyong | Eastern Australia Time | -05:30 |
| Kolkata Xaxim | Brasilia Time | 08:30 |
| Kolkata Wythall | United Kingdom Time | 04:30 |
| Kolkata Wytheville | Eastern Time | 09:30 |
| Kolkata Xaafuun | East Africa Time | 02:30 |
| Kolkata Xàbia | Central European Time | 03:30 |
| Kolkata Xalapa | Central Time | 11:30 |
| Kolkata Xalapa Enríquez | Central Time | 11:30 |
| Kolkata Xalisco | Mexican Pacific Time | 12:30 |