Time difference between London and St. Charles
−6 hSt. Charles is 6 hours behind London.
Observatory log
London and St. Charles, compared
- 01Difference now
St. Charles is 6 hours behind London.
London: BST (UTC+1) · St. Charles: CDT (UTC−5)
Next changeFrom 25 October 2026: St. Charles is 5 hours behind London.
- 02Through 2026–2027
- 1 January 2026 – 8 March 2026−6 h
- 8 March 2026 – 29 March 2026−5 h
- 29 March 2026 – 25 October 2026−6 h
- 25 October 2026 – 1 November 2026−5 h
- 1 November 2026 – 14 March 2027−6 h
- 14 March 2027 – 28 March 2027−5 h
- 28 March 2027 – 31 October 2027−6 h
- 31 October 2027 – 7 November 2027−5 h
- 7 November 2027 – 31 December 2027−6 h
Difference of St. Charles from London. It changes on the days either place changes its clocks (dates local to that place).
- 03Shared working hours
- Tue–Fri: 15:00–17:00 in London = 09:00–11:00 in St. Charles · 2 h
- Mon: 14:00–17:00 in London = 09:00–12:00 in St. Charles · 3 h
Counted as 09:00–17:00 local time on each place’s own working days, for the next seven days.
- 04Best time to meet
15:00–17:00 in London = 09:00–11:00 in St. Charles
Inside both working days (Tue–Fri).
- 05Weekend
London: Saturday and Sunday
St. Charles: Saturday and Sunday
24 hours
A day in London, in St. Charles
| London | St. Charles | Working hours, evening, night or weekend in each place |
|---|---|---|
| 00:00 | 18:00Yesterday | |
| 01:00 | 19:00Yesterday | |
| 02:00 | 20:00Yesterday | |
| 03:00 | 21:00Yesterday | |
| 04:00 | 22:00Yesterday | |
| 05:00 | 23:00Yesterday | |
| 06:00 | 00:00 | |
| 07:00 | 01:00 | |
| 08:00 | 02:00 | |
| 09:00 | 03:00 | |
| 10:00 | 04:00 | |
| 11:00 | 05:00 | |
| 12:00 | 06:00 | |
| 13:00 | 07:00 | |
| 14:00 | 08:00 | |
| 15:00 | 09:00 | |
| 16:00 | 10:00 | |
| 17:00 | 11:00 | |
| 18:00 | 12:00 | |
| 19:00 | 13:00 | |
| 20:00 | 14:00 | |
| 21:00 | 15:00 | |
| 22:00 | 16:00 | |
| 23:00 | 17:00 |
Working hoursEarly or eveningNightWeekend
Plan a meeting: London and St. Charles
More time differences with London
Questions
Asked about London and St. Charles
What is the time difference between London and St. Charles?
St. Charles is 6 hours behind London. This holds until 25 October 2026; then St. Charles is 5 hours behind London.
What is the best time for a call between London and St. Charles?
Inside both working days: Tue–Fri: 15:00–17:00 in London = 09:00–11:00 in St. Charles · 2 h.
When does the time difference between London and St. Charles change?
In the next 12 months it changes on: 25 October 2026 (−5 h); 1 November 2026 (−6 h); 14 March 2027 (−5 h); 28 March 2027 (−6 h).