Busan to Shanghai — −1h
−1h
Busan keeps Asia/Seoul while Shanghai runs on Asia/Shanghai. That's a −1h difference at this moment — Busan sees the sun first. The ~832 km between them mean their daylight windows barely overlap for meetings outside the 10:00–18:00 Busan slot.
Distance: 832 kmWork window overlap: 10:00–18:00 Busan
II
24 hours in parallel
| Hour A | Hour B | Overlap? |
|---|---|---|
| 00:00 | 23:00 | |
| 01:00 | 00:00 | |
| 02:00 | 01:00 | |
| 03:00 | 02:00 | |
| 04:00 | 03:00 | |
| 05:00 | 04:00 | |
| 06:00 | 05:00 | |
| 07:00 | 06:00 | |
| 08:00 | 07:00 | |
| 09:00 | 08:00 | |
| 10:00 | 09:00 | ● |
| 11:00 | 10:00 | ● |
| 12:00 | 11:00 | ● |
| 13:00 | 12:00 | ● |
| 14:00 | 13:00 | ● |
| 15:00 | 14:00 | ● |
| 16:00 | 15:00 | ● |
| 17:00 | 16:00 | ● |
| 18:00 | 17:00 | |
| 19:00 | 18:00 | |
| 20:00 | 19:00 | |
| 21:00 | 20:00 | |
| 22:00 | 21:00 | |
| 23:00 | 22:00 |