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