Observatory log
Mumbai and Atka, compared
- 01Difference now
Atka is 14 hours 30 minutes behind Mumbai.
Mumbai: IST (UTC+5:30) · Atka: HDT (UTC−9)
Next changeFrom 1 November 2026: Atka is 15 hours 30 minutes behind Mumbai.
- 02Through 2026–2027
- 1 January 2026 – 8 March 2026−15 h 30 min
- 8 March 2026 – 1 November 2026−14 h 30 min
- 1 November 2026 – 14 March 2027−15 h 30 min
- 14 March 2027 – 7 November 2027−14 h 30 min
- 7 November 2027 – 31 December 2027−15 h 30 min
Difference of Atka from Mumbai. 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
09:00–12:30 in Mumbai = 18:30–22:00 in Atka
No shared office hours: this is early or late for one side (Tue–Fri).
Also possible: Tue–Fri: 06:00–07:30 in Mumbai = 15:30–17:00 in Atka (yesterday) · 1 h 30 min.
- 05Weekend
Mumbai: Saturday and Sunday
Atka: Saturday and Sunday
24 hours
A day in Mumbai, in Atka
| Mumbai | Atka | Working hours, evening, night or weekend in each place |
|---|---|---|
| 00:00 | 09:30Yesterday | |
| 01:00 | 10:30Yesterday | |
| 02:00 | 11:30Yesterday | |
| 03:00 | 12:30Yesterday | |
| 04:00 | 13:30Yesterday | |
| 05:00 | 14:30Yesterday | |
| 06:00 | 15:30Yesterday | |
| 07:00 | 16:30Yesterday | |
| 08:00 | 17:30Yesterday | |
| 09:00 | 18:30Yesterday | |
| 10:00 | 19:30Yesterday | |
| 11:00 | 20:30Yesterday | |
| 12:00 | 21:30Yesterday | |
| 13:00 | 22:30Yesterday | |
| 14:00 | 23:30Yesterday | |
| 15:00 | 00:30 | |
| 16:00 | 01:30 | |
| 17:00 | 02:30 | |
| 18:00 | 03:30 | |
| 19:00 | 04:30 | |
| 20:00 | 05:30 | |
| 21:00 | 06:30 | |
| 22:00 | 07:30 | |
| 23:00 | 08:30 |
Working hoursEarly or eveningNightWeekend
Plan a meeting: Mumbai and Atka
More time differences with Mumbai
Questions
Asked about Mumbai and Atka
What is the time difference between Mumbai and Atka?
Atka is 14 hours 30 minutes behind Mumbai. This holds until 1 November 2026; then Atka is 15 hours 30 minutes behind Mumbai.
What is the best time for a call between Mumbai and Atka?
No shared office hours. The least awkward windows, early or late for one side: Tue–Fri: 09:00–12:30 in Mumbai = 18:30–22:00 in Atka (yesterday) · 3 h 30 min; Tue–Fri: 06:00–07:30 in Mumbai = 15:30–17:00 in Atka (yesterday) · 1 h 30 min.
When does the time difference between Mumbai and Atka change?
In the next 12 months it changes on: 1 November 2026 (−15 h 30 min); 14 March 2027 (−14 h 30 min).