| Suginami Harrison Hot Springs | Pacific Time | 17:00 |
| Suginami Harrison | Central Time | 15:00 |
| Suginami Harwich | Eastern Time | 14:00 |
| Suginami Harrodsburg | Eastern Time | 14:00 |
| Suginami Harrow | United Kingdom Time | 09:00 |
| Suginami Hartsdale | Eastern Time | 14:00 |
| Suginami Hartselle | Central Time | 15:00 |
| Suginami Hartshorne | Central Time | 15:00 |
| Suginami Hartsville | Eastern Time | 14:00 |
| Suginami Hartville | Eastern Time | 14:00 |
| Suginami Harfleur | Central European Time | 08:00 |
| Suginami Hardys Bay | Eastern Australia Time | -02:00 |
| Suginami Harburg | Central European Time | 08:00 |
| Suginami Hanwood | Eastern Australia Time | -02:00 |
| Suginami Hanumanbari | India Standard Time | 03:30 |
| Suginami Happy Valley | Pacific Time | 17:00 |
| Suginami Hanover | Eastern Time | 14:00 |
| Suginami Hang Dong | Indochina Time | 02:00 |
| Suginami Handsworth Wood | United Kingdom Time | 09:00 |
| Suginami Handforth | United Kingdom Time | 09:00 |
| Suginami Hanamkonda | India Standard Time | 03:30 |
| Suginami Hanau | Central European Time | 08:00 |
| Suginami Hamilton | Eastern Australia Time | -02:00 |
| Suginami Hämeenkyrö | Eastern European Time | 07:00 |
| Suginami Hamilton Township | Eastern Time | 14:00 |
| Suginami Hammerfest | Central European Time | 08:00 |
| Suginami Hammersbach | Central European Time | 08:00 |
| Suginami Hampton | Eastern Australia Time | -02:00 |
| Suginami Hammonton | Eastern Time | 14:00 |
| Suginami Hampi | India Standard Time | 03:30 |
| Suginami Hammamet Sud | Central European Time | 08:00 |
| Suginami Hammamet | Central European Time | 08:00 |
| Suginami Halli | Eastern European Time | 07:00 |
| Suginami Hallsville | Central Time | 15:00 |
| Suginami Hallam | Eastern Australia Time | -02:00 |
| Suginami Halifax | Eastern Time | 14:00 |
| Suginami Halton Hills | Eastern Time | 14:00 |
| Suginami Hamburg | Central European Time | 08:00 |
| Suginami Hadleigh | United Kingdom Time | 09:00 |
| Suginami Hagenow | Central European Time | 08:00 |
| Suginami Hagenthal-le-Haut | Central European Time | 08:00 |
| Suginami Hahndorf | Central Australia Time | -01:30 |
| Suginami HaGoshrim | Israel Time | 07:00 |
| Suginami Haiku-Pauwela | Hawaii-Aleutian Time | 19:00 |
| Suginami Haleiwa | Hawaii-Aleutian Time | 19:00 |
| Suginami Hales Corners | Central Time | 15:00 |
| Suginami Half Moon Bay | Pacific Time | 17:00 |
| Suginami Haldensleben | Central European Time | 08:00 |
| Suginami Hakone | Japan Time | 00:00 |
| Suginami Hakata Ward | Japan Time | 00:00 |