Observatory log
Chicago and San Ramon, compared
- 01Difference now
Chicago and San Ramon have the same time.
Chicago: CDT (UTC−5) · San Ramon: UTC−5 (UTC−5)
Next changeFrom 1 November 2026: San Ramon is 1 hour ahead of Chicago.
- 02Through 2026–2027
- 1 January 2026 – 8 March 2026+1 h
- 8 March 2026 – 1 November 2026Same time
- 1 November 2026 – 14 March 2027+1 h
- 14 March 2027 – 7 November 2027Same time
- 7 November 2027 – 31 December 2027+1 h
Difference of San Ramon from Chicago. It changes on the days either place changes its clocks (dates local to that place).
- 03Shared working hours
- Mon–Fri: 09:00–17:00 in Chicago = 09:00–17:00 in San Ramon · 8 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
09:00–17:00 in Chicago = 09:00–17:00 in San Ramon
Inside both working days (Mon–Fri).
- 05Weekend
Chicago: Saturday and Sunday
San Ramon: Saturday and Sunday
24 hours
A day in Chicago, in San Ramon
| Chicago | San Ramon | Working hours, evening, night or weekend in each place |
|---|---|---|
| 00:00 | 00:00 | |
| 01:00 | 01:00 | |
| 02:00 | 02:00 | |
| 03:00 | 03:00 | |
| 04:00 | 04:00 | |
| 05:00 | 05:00 | |
| 06:00 | 06:00 | |
| 07:00 | 07:00 | |
| 08:00 | 08:00 | |
| 09:00 | 09:00 | |
| 10:00 | 10:00 | |
| 11:00 | 11:00 | |
| 12:00 | 12:00 | |
| 13:00 | 13:00 | |
| 14:00 | 14:00 | |
| 15:00 | 15:00 | |
| 16:00 | 16:00 | |
| 17:00 | 17:00 | |
| 18:00 | 18:00 | |
| 19:00 | 19:00 | |
| 20:00 | 20:00 | |
| 21:00 | 21:00 | |
| 22:00 | 22:00 | |
| 23:00 | 23:00 |
Working hoursEarly or eveningNightWeekend
Plan a meeting: Chicago and San Ramon
More time differences with Chicago
Questions
Asked about Chicago and San Ramon
What is the time difference between Chicago and San Ramon?
Chicago and San Ramon have the same time. This holds until 1 November 2026; then San Ramon is 1 hour ahead of Chicago.
What is the best time for a call between Chicago and San Ramon?
Inside both working days: Mon–Fri: 09:00–17:00 in Chicago = 09:00–17:00 in San Ramon · 8 h.
When does the time difference between Chicago and San Ramon change?
In the next 12 months it changes on: 1 November 2026 (+1 h); 14 March 2027 (Same time).