Seattle, WA to Charlestown: time difference
Charlestown is 3 h ahead of Seattle, WA. Live clocks for both, the working hours they share, and how each one sits against your own time.
+3 h
Your time
One day, 2 clocks
Drag along the band to read any hour in every place at once.
Seattle, WA 03:46 3:46 AM Charlestown 06:46 6:46 AM You –:–
03:46 3:46 AM
Pacific Daylight Time · UTC-7
☀️ 07:22 · 🌙 18:32
06:46 6:46 AM
Atlantic Standard Time · UTC-4
☀️ 06:03 · 🌙 17:53
·
+3 h
Charlestown is 3 h ahead of Seattle, WA.
When you, Seattle, WA and Charlestown are all at the desk
Pick the working hours below – the window every location shares appears once your time zone is known.
Working hours
🇺🇸 Seattle, WA
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
🇰🇳 Charlestown
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 0 12 AM 1 1 AM 2 2 AM
📍 Your time
- Asleep
- Early
- Working hours
- Evening
- Both working
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Time zones side by side
| Detail | 🇺🇸 Seattle, WA | 🇰🇳 Charlestown |
|---|---|---|
| Local time | 03:46 | 06:46 |
| Local date | Saturday, October 10, 2026 | Saturday, October 10, 2026 |
| Time zone | Pacific Daylight Time | Atlantic Standard Time |
| UTC offset | UTC-7 | UTC-4 |
| Offset from Seattle, WA | — | +3 h |
| IANA zone | America/Los Angeles | America/St Kitts |
| Daylight saving | On summer time → UTC-8, Nov 1, 01:00 | Not observed |
| Sunrise | 07:22 | 06:03 |
| Sunset | 18:32 | 17:53 |
| Daylight | 11 h 11 min | 11 h 51 min |
| People on this clock | 737,015 | 1,500 |
Compare Seattle, WA with another city
More comparisons with Seattle, WA: the time zones next to it and the far side of the clock.
Nearby time zones
Big time differences
Seattle, WA and Charlestown: common questions
What is the time difference between Seattle, WA, and Charlestown?
Charlestown is 3 hours ahead: it uses UTC−4, while Seattle is on UTC−7.
If it is 9:00 AM in Seattle, WA, what time is it in Charlestown?
At 9:00 AM in Seattle, clocks in Charlestown show 12:00 PM.
What time is it in Charlestown when it is 6:00 PM in Seattle, WA?
When it is 6:00 PM in Seattle, it is 9:00 PM in Charlestown.
Is there a time when both Seattle, WA, and Charlestown are at work?
Yes: from 9:00 AM to 3:00 PM in Seattle (12:00 PM to 6:00 PM in Charlestown), the working days (9:00 AM–6:00 PM) overlap.
When does the date change in Charlestown compared with Seattle, WA?
The new day starts in Charlestown earlier: at 9:00 PM in Seattle it is already midnight there. Until 3:00 AM in Charlestown, Seattle is still on the previous day.
Does the time difference between Seattle, WA, and Charlestown change?
Yes. The clocks change only in Seattle. From November 1, 2026, Charlestown will be 4 hours ahead of Seattle.
