| Siheung-si Kilburn | Central Australia Time | -01:30 |
| Siheung-si Kilgore | Central Time | 15:00 |
| Siheung-si Kilimanjaro | East Africa Time | 06:00 |
| Siheung-si Kilinochchi | India Standard Time | 03:30 |
| Siheung-si Klil | Israel Time | 07:00 |
| Siheung-si Klang Dong | Indochina Time | 02:00 |
| Siheung-si Klagenfurt | Central European Time | 08:00 |
| Siheung-si Klopein | Central European Time | 08:00 |
| Siheung-si Knightdale | Eastern Time | 14:00 |
| Siheung-si Knoxfield | Eastern Australia Time | -02:00 |
| Siheung-si Knüllwald | Central European Time | 08:00 |
| Siheung-si Chuo Ward | Japan Time | 00:00 |
| Siheung-si Ko Samui | Indochina Time | 02:00 |
| Siheung-si Ko Chang | Indochina Time | 02:00 |
| Siheung-si Ko Pha-ngan | Indochina Time | 02:00 |
| Siheung-si Ko Phra Thong | Indochina Time | 02:00 |
| Siheung-si Kodagu | India Standard Time | 03:30 |
| Siheung-si Kochi | India Standard Time | 03:30 |
| Siheung-si Kochi | India Standard Time | 03:30 |
| Siheung-si Kiryat Tiv'on | Israel Time | 07:00 |
| Siheung-si Kirnapur | India Standard Time | 03:30 |
| Siheung-si Kirkwall | United Kingdom Time | 09:00 |
| Siheung-si Kittery | Eastern Time | 14:00 |
| Siheung-si Kitty Hawk | Eastern Time | 14:00 |
| Siheung-si Kitscoty | Mountain Time | 16:00 |
| Siheung-si Kiyose | Japan Time | 00:00 |
| Siheung-si Kita Ward | Japan Time | 00:00 |
| Siheung-si Kisosaki | Japan Time | 00:00 |
| Siheung-si Kham Yai | Indochina Time | 02:00 |
| Siheung-si Keystone | Mountain Time | 16:00 |
| Siheung-si Kfar Monash | Israel Time | 07:00 |
| Siheung-si Kfar Saba | Israel Time | 07:00 |
| Siheung-si Kfar Tavor | Israel Time | 07:00 |
| Siheung-si Khadki | India Standard Time | 03:30 |
| Siheung-si Khao Phang | Indochina Time | 02:00 |
| Siheung-si Khanote | Pakistan Time | 04:00 |
| Siheung-si Khetri Nagar | India Standard Time | 03:30 |
| Siheung-si Khimsar | India Standard Time | 03:30 |
| Siheung-si Khelil | Central European Time | 08:00 |
| Siheung-si Khatiwali | India Standard Time | 03:30 |
| Siheung-si Khurais | Arabian Time | 06:00 |
| Siheung-si Kemptville | Eastern Time | 14:00 |
| Siheung-si Kengalkempohalli | India Standard Time | 03:30 |
| Siheung-si Kemberg | Central European Time | 08:00 |
| Siheung-si Kelshi | India Standard Time | 03:30 |
| Siheung-si Kelso | Eastern Australia Time | -02:00 |
| Siheung-si Kelso | United Kingdom Time | 09:00 |
| Siheung-si Kelsterbach | Central European Time | 08:00 |
| Siheung-si Kelston | United Kingdom Time | 09:00 |
| Siheung-si Kelvin Grove | Eastern Australia Time | -01:00 |