Tonga to Agana Heights: time difference
Agana Heights is 3 h behind Tonga. Live clocks for both, the working hours they share, and how each one sits against your own time.
Your time
One day, 2 clocks
Drag along the band to read any hour in every place at once.
Tonga 23:18 11:18 PM Agana Heights 20:18 8:18 PM You –:–
23:18 11:18 PM
Tonga Standard Time · UTC+13
☀️ 06:15 · 🌙 18:42
20:18 8:18 PM
Chamorro Standard Time · UTC+10
☀️ 06:12 · 🌙 18:06
·
−3 h
Agana Heights is 3 h behind Tonga.
When you, Tonga and Agana Heights are all at the desk
Pick the working hours below – the window every location shares appears once your time zone is known.
Working hours
🇹🇴 Tonga
0 12 AM 1 1 AM 2 2 AM 3 3 AM 4 4 AM 5 5 AM 6 6 AM 7 7 AM 8 8 AM 9 9 AM 10 10 AM 11 11 AM 12 12 PM 13 1 PM 14 2 PM 15 3 PM 16 4 PM 17 5 PM 18 6 PM 19 7 PM 20 8 PM 21 9 PM 22 10 PM 23 11 PM
🇬🇺 Agana Heights
21 9 PM 22 10 PM 23 11 PM 0 12 AM 1 1 AM 2 2 AM 3 3 AM 4 4 AM 5 5 AM 6 6 AM 7 7 AM 8 8 AM 9 9 AM 10 10 AM 11 11 AM 12 12 PM 13 1 PM 14 2 PM 15 3 PM 16 4 PM 17 5 PM 18 6 PM 19 7 PM 20 8 PM
📍 Your time
- Asleep
- Early
- Working hours
- Evening
- Both working
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Time zones side by side
| Detail | 🇹🇴 Tonga | 🇬🇺 Agana Heights |
|---|---|---|
| Local time | 23:18 | 20:18 |
| Local date | Saturday, October 10, 2026 | Saturday, October 10, 2026 |
| Time zone | Tonga Standard Time | Chamorro Standard Time |
| UTC offset | UTC+13 | UTC+10 |
| Offset from Tonga | — | −3 h |
| IANA zone | Pacific/Tongatapu | Pacific/Guam |
| Daylight saving | Not observed | Not observed |
| Sunrise | 06:15 | 06:12 |
| Sunset | 18:42 | 18:06 |
| Daylight | 12 h 27 min | 11 h 55 min |
| People on this clock | 108,020 | 3,940 |
Compare Tonga with another city
More comparisons with Tonga: the time zones next to it and the far side of the clock.
Nearby time zones
Big time differences
Tonga and Agana Heights: common questions
How many hours behind Tonga is Agana Heights?
The clocks in Agana Heights are 3 hours behind those in Tonga (UTC+10 and UTC+13).
What time is it in Agana Heights at the start of the working day in Tonga?
The working day in Tonga starts at 9:00 AM; in Agana Heights it is 6:00 AM at that moment.
If it is 6:00 PM in Tonga, what time is it in Agana Heights?
At 6:00 PM in Tonga, clocks in Agana Heights show 3:00 PM.
When do working hours in Tonga and in Agana Heights overlap?
Working hours (9:00 AM–6:00 PM) overlap from 12:00 PM to 6:00 PM in Tonga, which is 9:00 AM to 3:00 PM in Agana Heights.
Until what time in Tonga is it still yesterday in Agana Heights?
Before 3:00 AM in Tonga, the date in Agana Heights has not changed yet. From 9:00 PM in Agana Heights, it is already the next day in Tonga.
Does the time difference between Tonga and Agana Heights change?
No. Neither place uses daylight saving time, so the difference stays 3 hours all year.
