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