| Seoul Higashihiroshima | Japan Time | 00:00 |
| Seoul Hidalgo | Central Time | 15:00 |
| Seoul Hillsville | Eastern Time | 14:00 |
| Seoul Hilmar | Pacific Time | 17:00 |
| Seoul Hill City | Mountain Time | 16:00 |
| Seoul Hillarys | Western Australia Time | 01:00 |
| Seoul Hijrat Al Harah | Arabian Time | 06:00 |
| Seoul Hikkaduwa | India Standard Time | 03:30 |
| Seoul Highland Heights | Eastern Time | 14:00 |
| Seoul Highnam | United Kingdom Time | 09:00 |
| Seoul Highton | Eastern Australia Time | -02:00 |
| Seoul Hérémence | Central European Time | 08:00 |
| Seoul Heringsdorf | Central European Time | 08:00 |
| Seoul Henrico | Eastern Time | 14:00 |
| Seoul Hepburn Springs | Eastern Australia Time | -02:00 |
| Seoul Hephzibah | Eastern Time | 14:00 |
| Seoul Henndorf am Wallersee | Central European Time | 08:00 |
| Seoul Herodsfoot | United Kingdom Time | 09:00 |
| Seoul Hessle | United Kingdom Time | 09:00 |
| Seoul Herve | Central European Time | 08:00 |
| Seoul Herrin | Central Time | 15:00 |
| Seoul Hershey | Eastern Time | 14:00 |
| Seoul Herrera de Pisuerga | Central European Time | 08:00 |
| Seoul Heguri | Japan Time | 00:00 |
| Seoul Heftziba | Israel Time | 07:00 |
| Seoul Heidenheim | Central European Time | 08:00 |
| Seoul Heimenkirch | Central European Time | 08:00 |
| Seoul Hendersonville | Eastern Time | 14:00 |
| Seoul Hemmadi | India Standard Time | 03:30 |
| Seoul Helen | Eastern Time | 14:00 |
| Seoul Helmsley | United Kingdom Time | 09:00 |
| Seoul Haymarket | Eastern Australia Time | -02:00 |
| Seoul Haymarket | Eastern Time | 14:00 |
| Seoul Hayti | Central Time | 15:00 |
| Seoul Hazelwood Park | Central Australia Time | -01:30 |
| Seoul Hazlehurst | Eastern Time | 14:00 |
| Seoul Headingley | Central Time | 15:00 |
| Seoul Headland | Central Time | 15:00 |
| Seoul Healdsburg | Pacific Time | 17:00 |
| Seoul Hebden Bridge | United Kingdom Time | 09:00 |
| Seoul Heber Springs | Central Time | 15:00 |
| Seoul Heath | Central Time | 15:00 |
| Seoul Heathmont | Eastern Australia Time | -02:00 |
| Seoul Heathridge | Western Australia Time | 01:00 |
| Seoul Hayden | Pacific Time | 17:00 |
| Seoul Hawthorn | Eastern Australia Time | -02:00 |
| Seoul Hawthorn East | Eastern Australia Time | -02:00 |
| Seoul Hawaiian Paradise Park | Hawaii-Aleutian Time | 19:00 |
| Seoul Hawera | New Zealand Time | -04:00 |
| Seoul Hawes | United Kingdom Time | 09:00 |