Observatory log
London and Atka, compared
- 01Difference now
Atka is 10 hours behind London.
London: BST (UTC+1) · Atka: HDT (UTC−9)
Next changeFrom 25 October 2026: Atka is 9 hours behind London.
- 02Through 2026–2027
- 1 January 2026 – 8 March 2026−10 h
- 8 March 2026 – 29 March 2026−9 h
- 29 March 2026 – 25 October 2026−10 h
- 25 October 2026 – 1 November 2026−9 h
- 1 November 2026 – 14 March 2027−10 h
- 14 March 2027 – 28 March 2027−9 h
- 28 March 2027 – 31 October 2027−10 h
- 31 October 2027 – 7 November 2027−9 h
- 7 November 2027 – 31 December 2027−10 h
Difference of Atka from London. It changes on the days either place changes its clocks (dates local to that place).
- 03Shared working hours
Their working days never overlap.
Counted as 09:00–17:00 local time on each place’s own working days, for the next seven days.
- 04Best time to meet
19:00–22:00 in London = 09:00–12:00 in Atka
No shared office hours: this is early or late for one side (Mon–Fri).
Also possible: Mon–Fri: 16:00–17:00 in London = 06:00–07:00 in Atka · 1 h.
- 05Weekend
London: Saturday and Sunday
Atka: Saturday and Sunday
24 hours
A day in London, in Atka
| London | Atka | Working hours, evening, night or weekend in each place |
|---|---|---|
| 00:00 | 14:00Yesterday | |
| 01:00 | 15:00Yesterday | |
| 02:00 | 16:00Yesterday | |
| 03:00 | 17:00Yesterday | |
| 04:00 | 18:00Yesterday | |
| 05:00 | 19:00Yesterday | |
| 06:00 | 20:00Yesterday | |
| 07:00 | 21:00Yesterday | |
| 08:00 | 22:00Yesterday | |
| 09:00 | 23:00Yesterday | |
| 10:00 | 00:00 | |
| 11:00 | 01:00 | |
| 12:00 | 02:00 | |
| 13:00 | 03:00 | |
| 14:00 | 04:00 | |
| 15:00 | 05:00 | |
| 16:00 | 06:00 | |
| 17:00 | 07:00 | |
| 18:00 | 08:00 | |
| 19:00 | 09:00 | |
| 20:00 | 10:00 | |
| 21:00 | 11:00 | |
| 22:00 | 12:00 | |
| 23:00 | 13:00 |
Working hoursEarly or eveningNightWeekend
Plan a meeting: London and Atka
More time differences with London
Questions
Asked about London and Atka
What is the time difference between London and Atka?
Atka is 10 hours behind London. This holds until 25 October 2026; then Atka is 9 hours behind London.
What is the best time for a call between London and Atka?
No shared office hours. The least awkward windows, early or late for one side: Mon–Fri: 19:00–22:00 in London = 09:00–12:00 in Atka · 3 h; Mon–Fri: 16:00–17:00 in London = 06:00–07:00 in Atka · 1 h.
When does the time difference between London and Atka change?
In the next 12 months it changes on: 25 October 2026 (−9 h); 1 November 2026 (−10 h); 14 March 2027 (−9 h); 28 March 2027 (−10 h).