Observatory log
London and Blenheim, compared
- 01Difference now
Blenheim is 12 hours ahead of London.
London: BST (UTC+1) · Blenheim: NZDT (UTC+13)
Next changeFrom 25 October 2026: Blenheim is 13 hours ahead of London.
- 02Through 2026–2027
- 1 January 2026 – 29 March 2026+13 h
- 29 March 2026 – 5 April 2026+12 h
- 5 April 2026 – 27 September 2026+11 h
- 27 September 2026 – 25 October 2026+12 h
- 25 October 2026 – 28 March 2027+13 h
- 28 March 2027 – 4 April 2027+12 h
- 4 April 2027 – 26 September 2027+11 h
- 26 September 2027 – 31 October 2027+12 h
- 31 October 2027 – 31 December 2027+13 h
Difference of Blenheim 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
09:00–10:00 in London = 21:00–22:00 in Blenheim
No shared office hours: this is early or late for one side (Mon–Fri).
Also possible: Mon–Thu: 21:00–22:00 in London = 09:00–10:00 in Blenheim (tomorrow) · 1 h.
- 05Weekend
London: Saturday and Sunday
Blenheim: Saturday and Sunday
24 hours
A day in London, in Blenheim
| London | Blenheim | Working hours, evening, night or weekend in each place |
|---|---|---|
| 00:00 | 12:00 | |
| 01:00 | 13:00 | |
| 02:00 | 14:00 | |
| 03:00 | 15:00 | |
| 04:00 | 16:00 | |
| 05:00 | 17:00 | |
| 06:00 | 18:00 | |
| 07:00 | 19:00 | |
| 08:00 | 20:00 | |
| 09:00 | 21:00 | |
| 10:00 | 22:00 | |
| 11:00 | 23:00 | |
| 12:00 | 00:00Tomorrow | |
| 13:00 | 01:00Tomorrow | |
| 14:00 | 02:00Tomorrow | |
| 15:00 | 03:00Tomorrow | |
| 16:00 | 04:00Tomorrow | |
| 17:00 | 05:00Tomorrow | |
| 18:00 | 06:00Tomorrow | |
| 19:00 | 07:00Tomorrow | |
| 20:00 | 08:00Tomorrow | |
| 21:00 | 09:00Tomorrow | |
| 22:00 | 10:00Tomorrow | |
| 23:00 | 11:00Tomorrow |
Working hoursEarly or eveningNightWeekend
Plan a meeting: London and Blenheim
More time differences with London
Questions
Asked about London and Blenheim
What is the time difference between London and Blenheim?
Blenheim is 12 hours ahead of London. This holds until 25 October 2026; then Blenheim is 13 hours ahead of London.
What is the best time for a call between London and Blenheim?
No shared office hours. The least awkward windows, early or late for one side: Mon–Fri: 09:00–10:00 in London = 21:00–22:00 in Blenheim · 1 h; Mon–Thu: 21:00–22:00 in London = 09:00–10:00 in Blenheim (tomorrow) · 1 h.
When does the time difference between London and Blenheim change?
In the next 12 months it changes on: 25 October 2026 (+13 h); 28 March 2027 (+12 h); 4 April 2027 (+11 h); 26 September 2027 (+12 h).