When it is 12:00 PM in Great Falls, it is 3:00 AM the next day in Tokyo.
📞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 15 hours behind Tokyo.
🕐 Add 15 hours to Great Falls time to get Tokyo time.
Great Falls uses 6 hours behind Universal Time (UTC-6) and Tokyo uses 9 hours ahead of Universal Time (UTC+9).
| Great Falls Time | Tokyo Time | |
|---|---|---|
| 12 AM Great Falls Time | ↔ | ☼ 3 PM Tokyo Time |
| 1 AM Great Falls Time | ↔ | ☼ 4 PM Tokyo Time |
| 2 AM Great Falls Time | ↔ | ☼ 5 PM Tokyo Time |
| 3 AM Great Falls Time | ↔ | ☼ 6 PM Tokyo Time |
| 4 AM Great Falls Time | ↔ | 7 PM Tokyo Time |
| 5 AM Great Falls Time | ↔ | 8 PM Tokyo Time |
| ☼ 6 AM Great Falls Time | ↔ | 9 PM Tokyo Time |
| ☼ 7 AM Great Falls Time | ↔ | 10 PM Tokyo Time |
| ☼ 8 AM Great Falls Time | ↔ | 11 PM Tokyo Time |
| ☼ 9 AM Great Falls Time | ↔ | 12 AM Tokyo Time |
| ☼ 10 AM Great Falls Time | ↔ | 1 AM Tokyo Time |
| ☼ 11 AM Great Falls Time | ↔ | 2 AM Tokyo Time |
| Great Falls Time | Tokyo Time | |
|---|---|---|
| ☼ 12 PM Great Falls Time | ↔ | 3 AM Tokyo Time |
| ☼ 1 PM Great Falls Time | ↔ | 4 AM Tokyo Time |
| ☼ 2 PM Great Falls Time | ↔ | ☼ 5 AM Tokyo Time |
| ☼ 3 PM Great Falls Time | ↔ | ☼ 6 AM Tokyo Time |
| ☼ 4 PM Great Falls Time | ↔ | ☼ 7 AM Tokyo Time |
| ☼ 5 PM Great Falls Time | ↔ | ☼ 8 AM Tokyo Time |
| ☼ 6 PM Great Falls Time | ↔ | ☼ 9 AM Tokyo Time |
| ☼ 7 PM Great Falls Time | ↔ | ☼ 10 AM Tokyo Time |
| ☼ 8 PM Great Falls Time | ↔ | ☼ 11 AM Tokyo Time |
| 9 PM Great Falls Time | ↔ | ☼ 12 PM Tokyo Time |
| 10 PM Great Falls Time | ↔ | ☼ 1 PM Tokyo Time |
| 11 PM Great Falls Time | ↔ | ☼ 2 PM Tokyo Time |
Great Falls is 15 hours behind Tokyo.
Great Falls is behind Tokyo by 15 hours.
It is 12:00 AM the next day in Tokyo.