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