| Suginami Hong | Central European Time | 08:00 |
| Suginami Hong Kong | Hong Kong Time | 01:00 |
| Suginami Hong Kong | Hong Kong Time | 01:00 |
| Suginami Hong Kong | Hong Kong Time | 01:00 |
| Suginami Hounslow | United Kingdom Time | 09:00 |
| Suginami Hotchkiss | Mountain Time | 16:00 |
| Suginami Hoylake | United Kingdom Time | 09:00 |
| Suginami Howell | Eastern Time | 14:00 |
| Suginami Howrah | India Standard Time | 03:30 |
| Suginami Hoxie | Central Time | 15:00 |
| Suginami Huanggang | China Time | 01:00 |
| Suginami Huajuapan de León | Central Time | 15:00 |
| Suginami Himmelkron | Central European Time | 08:00 |
| Suginami Hima | East Africa Time | 06:00 |
| Suginami Hillsborough | Eastern Time | 14:00 |
| Suginami Hioki | Japan Time | 00:00 |
| Suginami Hiram | Eastern Time | 14:00 |
| Suginami Hingham | Eastern Time | 14:00 |
| Suginami Hochdorf | Central European Time | 08:00 |
| Suginami Hitzacker | Central European Time | 08:00 |
| Suginami Homebush | Eastern Australia Time | -02:00 |
| Suginami Hondarribia | Central European Time | 08:00 |
| Suginami Homps | Central European Time | 08:00 |
| Suginami Holywood | United Kingdom Time | 09:00 |
| Suginami Holmes Beach | Eastern Time | 14:00 |
| Suginami Holme's Hill | United Kingdom Time | 09:00 |
| Suginami Hollywood | Eastern Time | 14:00 |
| Suginami Holly Hill | Eastern Time | 14:00 |
| Suginami Holly Hill | Eastern Time | 14:00 |
| Suginami Hokes Bluff | Central Time | 15:00 |
| Suginami Hokuto | Japan Time | 00:00 |
| Suginami Holden Hill | Central Australia Time | -01:30 |
| Suginami Holdenville | Central Time | 15:00 |
| Suginami Holdorf | Central European Time | 08:00 |
| Suginami Holdrege | Central Time | 15:00 |
| Suginami Holesov | Central European Time | 08:00 |
| Suginami Holgate | Eastern Australia Time | -02:00 |
| Suginami Hogsback | South Africa Standard Time | 07:00 |
| Suginami Hofheim | Central European Time | 08:00 |
| Suginami Hoge Hexel | Central European Time | 08:00 |
| Suginami Heubach | Central European Time | 08:00 |
| Suginami Hethersett | United Kingdom Time | 09:00 |
| Suginami Hewlett | Eastern Time | 14:00 |
| Suginami Hexham | Eastern Australia Time | -02:00 |
| Suginami Hexham | United Kingdom Time | 09:00 |
| Suginami Heydon | United Kingdom Time | 09:00 |
| Suginami Highgate | Western Australia Time | 01:00 |
| Suginami High Falls | Eastern Time | 14:00 |
| Suginami Higashiyama Ward | Japan Time | 00:00 |
| Suginami Higashi Ward | Japan Time | 00:00 |