Observatory log
Singapore and Ann Arbor, compared
- 01Difference now
Ann Arbor is 12 hours behind Singapore.
Singapore: UTC+8 (UTC+8) · Ann Arbor: EDT (UTC−4)
Next changeFrom 1 November 2026: Ann Arbor is 13 hours behind Singapore.
- 02Through 2026–2027
- 1 January 2026 – 8 March 2026−13 h
- 8 March 2026 – 1 November 2026−12 h
- 1 November 2026 – 14 March 2027−13 h
- 14 March 2027 – 7 November 2027−12 h
- 7 November 2027 – 31 December 2027−13 h
Difference of Ann Arbor from Singapore. 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
21:00–22:00 in Singapore = 09:00–10:00 in Ann Arbor
No shared office hours: this is early or late for one side (Mon–Fri).
Also possible: Tue–Fri: 09:00–10:00 in Singapore = 21:00–22:00 in Ann Arbor (yesterday) · 1 h.
- 05Weekend
Singapore: Saturday and Sunday
Ann Arbor: Saturday and Sunday
24 hours
A day in Singapore, in Ann Arbor
| Singapore | Ann Arbor | Working hours, evening, night or weekend in each place |
|---|---|---|
| 00:00 | 12:00Yesterday | |
| 01:00 | 13:00Yesterday | |
| 02:00 | 14:00Yesterday | |
| 03:00 | 15:00Yesterday | |
| 04:00 | 16:00Yesterday | |
| 05:00 | 17:00Yesterday | |
| 06:00 | 18:00Yesterday | |
| 07:00 | 19:00Yesterday | |
| 08:00 | 20:00Yesterday | |
| 09:00 | 21:00Yesterday | |
| 10:00 | 22:00Yesterday | |
| 11:00 | 23:00Yesterday | |
| 12:00 | 00:00 | |
| 13:00 | 01:00 | |
| 14:00 | 02:00 | |
| 15:00 | 03:00 | |
| 16:00 | 04:00 | |
| 17:00 | 05:00 | |
| 18:00 | 06:00 | |
| 19:00 | 07:00 | |
| 20:00 | 08:00 | |
| 21:00 | 09:00 | |
| 22:00 | 10:00 | |
| 23:00 | 11:00 |
Working hoursEarly or eveningNightWeekend
Questions
Asked about Singapore and Ann Arbor
What is the time difference between Singapore and Ann Arbor?
Ann Arbor is 12 hours behind Singapore. This holds until 1 November 2026; then Ann Arbor is 13 hours behind Singapore.
What is the best time for a call between Singapore and Ann Arbor?
No shared office hours. The least awkward windows, early or late for one side: Mon–Fri: 21:00–22:00 in Singapore = 09:00–10:00 in Ann Arbor · 1 h; Tue–Fri: 09:00–10:00 in Singapore = 21:00–22:00 in Ann Arbor (yesterday) · 1 h.
When does the time difference between Singapore and Ann Arbor change?
In the next 12 months it changes on: 1 November 2026 (−13 h); 14 March 2027 (−12 h).