When it is 12:00 PM in Yangsan, it is 11:00 PM the previous day in Boston.
📞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.
Yangsan is 13 hours ahead of Boston.
🕐 Subtract 13 hours from Yangsan time to get Boston time.
Yangsan uses 9 hours ahead of Universal Time (UTC+9) and Boston uses 4 hours behind Universal Time (UTC-4).
| Yangsan Time | Boston Time | |
|---|---|---|
| 12 AM Yangsan Time | ↔ | ☼ 11 AM Boston Time |
| 1 AM Yangsan Time | ↔ | ☼ 12 PM Boston Time |
| 2 AM Yangsan Time | ↔ | ☼ 1 PM Boston Time |
| 3 AM Yangsan Time | ↔ | ☼ 2 PM Boston Time |
| 4 AM Yangsan Time | ↔ | ☼ 3 PM Boston Time |
| ☼ 5 AM Yangsan Time | ↔ | ☼ 4 PM Boston Time |
| ☼ 6 AM Yangsan Time | ↔ | ☼ 5 PM Boston Time |
| ☼ 7 AM Yangsan Time | ↔ | ☼ 6 PM Boston Time |
| ☼ 8 AM Yangsan Time | ↔ | ☼ 7 PM Boston Time |
| ☼ 9 AM Yangsan Time | ↔ | ☼ 8 PM Boston Time |
| ☼ 10 AM Yangsan Time | ↔ | 9 PM Boston Time |
| ☼ 11 AM Yangsan Time | ↔ | 10 PM Boston Time |
| Yangsan Time | Boston Time | |
|---|---|---|
| ☼ 12 PM Yangsan Time | ↔ | 11 PM Boston Time |
| ☼ 1 PM Yangsan Time | ↔ | 12 AM Boston Time |
| ☼ 2 PM Yangsan Time | ↔ | 1 AM Boston Time |
| ☼ 3 PM Yangsan Time | ↔ | 2 AM Boston Time |
| ☼ 4 PM Yangsan Time | ↔ | 3 AM Boston Time |
| ☼ 5 PM Yangsan Time | ↔ | 4 AM Boston Time |
| ☼ 6 PM Yangsan Time | ↔ | ☼ 5 AM Boston Time |
| ☼ 7 PM Yangsan Time | ↔ | ☼ 6 AM Boston Time |
| 8 PM Yangsan Time | ↔ | ☼ 7 AM Boston Time |
| 9 PM Yangsan Time | ↔ | ☼ 8 AM Boston Time |
| 10 PM Yangsan Time | ↔ | ☼ 9 AM Boston Time |
| 11 PM Yangsan Time | ↔ | ☼ 10 AM Boston Time |
Yangsan is 13 hours ahead of Boston.
Yangsan is ahead of Boston by 13 hours.
It is 8:00 PM the previous day in Boston.