When it is 12:00 PM in Costa Mesa, it is 4:00 AM the next day in Seoul.
📞There is no overlap during standard 9-to-5 business hours, so a call may need to be early or late in the day for one side.
Costa Mesa is 16 hours behind Seoul.
🕐 Add 16 hours to Costa Mesa time to get Seoul time.
Costa Mesa uses 7 hours behind Universal Time (UTC-7) and Seoul uses 9 hours ahead of Universal Time (UTC+9).
| Costa Mesa Time | Seoul Time | |
|---|---|---|
| 12 AM Costa Mesa Time | ↔ | ☼ 4 PM Seoul Time |
| 1 AM Costa Mesa Time | ↔ | ☼ 5 PM Seoul Time |
| 2 AM Costa Mesa Time | ↔ | ☼ 6 PM Seoul Time |
| 3 AM Costa Mesa Time | ↔ | ☼ 7 PM Seoul Time |
| 4 AM Costa Mesa Time | ↔ | 8 PM Seoul Time |
| ☼ 5 AM Costa Mesa Time | ↔ | 9 PM Seoul Time |
| ☼ 6 AM Costa Mesa Time | ↔ | 10 PM Seoul Time |
| ☼ 7 AM Costa Mesa Time | ↔ | 11 PM Seoul Time |
| ☼ 8 AM Costa Mesa Time | ↔ | 12 AM Seoul Time |
| ☼ 9 AM Costa Mesa Time | ↔ | 1 AM Seoul Time |
| ☼ 10 AM Costa Mesa Time | ↔ | 2 AM Seoul Time |
| ☼ 11 AM Costa Mesa Time | ↔ | 3 AM Seoul Time |
| Costa Mesa Time | Seoul Time | |
|---|---|---|
| ☼ 12 PM Costa Mesa Time | ↔ | 4 AM Seoul Time |
| ☼ 1 PM Costa Mesa Time | ↔ | ☼ 5 AM Seoul Time |
| ☼ 2 PM Costa Mesa Time | ↔ | ☼ 6 AM Seoul Time |
| ☼ 3 PM Costa Mesa Time | ↔ | ☼ 7 AM Seoul Time |
| ☼ 4 PM Costa Mesa Time | ↔ | ☼ 8 AM Seoul Time |
| ☼ 5 PM Costa Mesa Time | ↔ | ☼ 9 AM Seoul Time |
| ☼ 6 PM Costa Mesa Time | ↔ | ☼ 10 AM Seoul Time |
| ☼ 7 PM Costa Mesa Time | ↔ | ☼ 11 AM Seoul Time |
| ☼ 8 PM Costa Mesa Time | ↔ | ☼ 12 PM Seoul Time |
| 9 PM Costa Mesa Time | ↔ | ☼ 1 PM Seoul Time |
| 10 PM Costa Mesa Time | ↔ | ☼ 2 PM Seoul Time |
| 11 PM Costa Mesa Time | ↔ | ☼ 3 PM Seoul Time |
Costa Mesa is 16 hours behind Seoul.
Costa Mesa is behind Seoul by 16 hours.
It is 1:00 AM the next day in Seoul.