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