| Mainpuri Hanumanbari | India Standard Time | 00:00 |
| Mainpuri Hang Dong | Indochina Time | -01:30 |
| Mainpuri Handsworth Wood | United Kingdom Time | 04:30 |
| Mainpuri Handforth | United Kingdom Time | 04:30 |
| Mainpuri Hooksett | Eastern Time | 09:30 |
| Mainpuri Hope | Central Time | 10:30 |
| Mainpuri Hope | Pacific Time | 12:30 |
| Mainpuri Hope Island | Eastern Australia Time | -04:30 |
| Mainpuri Hopland | Pacific Time | 12:30 |
| Mainpuri Honiton | United Kingdom Time | 04:30 |
| Mainpuri Honnihalli | India Standard Time | 00:00 |
| Mainpuri Homebush | Eastern Australia Time | -04:30 |
| Mainpuri Homps | Central European Time | 03:30 |
| Mainpuri Hondarribia | Central European Time | 03:30 |
| Mainpuri Hong Kong | Hong Kong Time | -02:30 |
| Mainpuri Hong Kong | Hong Kong Time | -02:30 |
| Mainpuri Honesdale | Eastern Time | 09:30 |
| Mainpuri Honfleur | Central European Time | 03:30 |
| Mainpuri Hong | Central European Time | 03:30 |
| Mainpuri Hong Kong | Hong Kong Time | -02:30 |
| Mainpuri Holywood | United Kingdom Time | 04:30 |
| Mainpuri Holmes Beach | Eastern Time | 09:30 |
| Mainpuri Holme's Hill | United Kingdom Time | 04:30 |
| Mainpuri Hollywood | Eastern Time | 09:30 |
| Mainpuri Horseheads | Eastern Time | 09:30 |
| Mainpuri Horebeke | Central European Time | 03:30 |
| Mainpuri Horní Věstonice | Central European Time | 03:30 |
| Mainpuri Horning | United Kingdom Time | 04:30 |
| Mainpuri Ikšķile | Eastern European Time | 02:30 |
| Mainpuri Ilavala Hobli | India Standard Time | 00:00 |
| Mainpuri Ileret | East Africa Time | 02:30 |
| Mainpuri Ilford | United Kingdom Time | 04:30 |
| Mainpuri Ilfracombe | United Kingdom Time | 04:30 |
| Mainpuri Illueca | Central European Time | 03:30 |
| Mainpuri Iligan City | Philippine Time | -02:30 |
| Mainpuri Imboden | Central Time | 10:30 |
| Mainpuri Immenstadt | Central European Time | 03:30 |
| Mainpuri Johns Island | Eastern Time | 09:30 |