When it is 12:00 PM in Great Falls, it is 2:00 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.
Great Falls is 14 hours behind Perth.
🕐 Add 14 hours to Great Falls time to get Perth time.
Great Falls uses 6 hours behind Universal Time (UTC-6) and Perth uses 8 hours ahead of Universal Time (UTC+8).
| Great Falls Time | Perth Time | |
|---|---|---|
| 12 AM Great Falls Time | ↔ | ☼ 2 PM Perth Time |
| 1 AM Great Falls Time | ↔ | ☼ 3 PM Perth Time |
| 2 AM Great Falls Time | ↔ | ☼ 4 PM Perth Time |
| 3 AM Great Falls Time | ↔ | ☼ 5 PM Perth Time |
| 4 AM Great Falls Time | ↔ | 6 PM Perth Time |
| ☼ 5 AM Great Falls Time | ↔ | 7 PM Perth Time |
| ☼ 6 AM Great Falls Time | ↔ | 8 PM Perth Time |
| ☼ 7 AM Great Falls Time | ↔ | 9 PM Perth Time |
| ☼ 8 AM Great Falls Time | ↔ | 10 PM Perth Time |
| ☼ 9 AM Great Falls Time | ↔ | 11 PM Perth Time |
| ☼ 10 AM Great Falls Time | ↔ | 12 AM Perth Time |
| ☼ 11 AM Great Falls Time | ↔ | 1 AM Perth Time |
| Great Falls Time | Perth Time | |
|---|---|---|
| ☼ 12 PM Great Falls Time | ↔ | 2 AM Perth Time |
| ☼ 1 PM Great Falls Time | ↔ | 3 AM Perth Time |
| ☼ 2 PM Great Falls Time | ↔ | 4 AM Perth Time |
| ☼ 3 PM Great Falls Time | ↔ | 5 AM Perth Time |
| ☼ 4 PM Great Falls Time | ↔ | 6 AM Perth Time |
| ☼ 5 PM Great Falls Time | ↔ | ☼ 7 AM Perth Time |
| ☼ 6 PM Great Falls Time | ↔ | ☼ 8 AM Perth Time |
| ☼ 7 PM Great Falls Time | ↔ | ☼ 9 AM Perth Time |
| ☼ 8 PM Great Falls Time | ↔ | ☼ 10 AM Perth Time |
| ☼ 9 PM Great Falls Time | ↔ | ☼ 11 AM Perth Time |
| 10 PM Great Falls Time | ↔ | ☼ 12 PM Perth Time |
| 11 PM Great Falls Time | ↔ | ☼ 1 PM Perth Time |
Great Falls is 14 hours behind Perth.
Great Falls is behind Perth by 14 hours.
It is 11:00 PM in Perth.