When it is 12:00 PM in National City, 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.
National City is 16 hours behind Seoul.
🕐 Add 16 hours to National City time to get Seoul time.
National City uses 7 hours behind Universal Time (UTC-7) and Seoul uses 9 hours ahead of Universal Time (UTC+9).
| National City Time | Seoul Time | |
|---|---|---|
| 12 AM National City Time | ↔ | ☼ 4 PM Seoul Time |
| 1 AM National City Time | ↔ | ☼ 5 PM Seoul Time |
| 2 AM National City Time | ↔ | ☼ 6 PM Seoul Time |
| 3 AM National City Time | ↔ | ☼ 7 PM Seoul Time |
| 4 AM National City Time | ↔ | 8 PM Seoul Time |
| ☼ 5 AM National City Time | ↔ | 9 PM Seoul Time |
| ☼ 6 AM National City Time | ↔ | 10 PM Seoul Time |
| ☼ 7 AM National City Time | ↔ | 11 PM Seoul Time |
| ☼ 8 AM National City Time | ↔ | 12 AM Seoul Time |
| ☼ 9 AM National City Time | ↔ | 1 AM Seoul Time |
| ☼ 10 AM National City Time | ↔ | 2 AM Seoul Time |
| ☼ 11 AM National City Time | ↔ | 3 AM Seoul Time |
| National City Time | Seoul Time | |
|---|---|---|
| ☼ 12 PM National City Time | ↔ | 4 AM Seoul Time |
| ☼ 1 PM National City Time | ↔ | ☼ 5 AM Seoul Time |
| ☼ 2 PM National City Time | ↔ | ☼ 6 AM Seoul Time |
| ☼ 3 PM National City Time | ↔ | ☼ 7 AM Seoul Time |
| ☼ 4 PM National City Time | ↔ | ☼ 8 AM Seoul Time |
| ☼ 5 PM National City Time | ↔ | ☼ 9 AM Seoul Time |
| ☼ 6 PM National City Time | ↔ | ☼ 10 AM Seoul Time |
| ☼ 7 PM National City Time | ↔ | ☼ 11 AM Seoul Time |
| 8 PM National City Time | ↔ | ☼ 12 PM Seoul Time |
| 9 PM National City Time | ↔ | ☼ 1 PM Seoul Time |
| 10 PM National City Time | ↔ | ☼ 2 PM Seoul Time |
| 11 PM National City Time | ↔ | ☼ 3 PM Seoul Time |
National City is 16 hours behind Seoul.
National City is behind Seoul by 16 hours.
It is 1:00 AM the next day in Seoul.