Chicago and Athens working-hours overlap
On Monday, 28 September 2026, Chicago is 8 hours behind Athens — UTC-05:00 against UTC+03:00. They share no working hours that day at all: Chicago works 14:00–22:00 UTC and Athens works 06:00–14:00 UTC, and those two windows do not meet. Chicago changes clocks on Sunday, 1 November 2026, and the gap between them goes from 7 hours to 8 hours. Athens changes clocks on Sunday, 25 October 2026, and the gap between them goes from 8 hours to 7 hours.
Every figure on this page describes Monday, 28 September 2026 — a fixed day, not the day you are reading it. Working hours are 09:00–17:00 local time for both cities; change either, or pick another date, in the overlap calculator.
Shared working hours
No shared working hours on this date.
On this date the two working days do not meet. Widening one side’s hours or choosing another date is what changes it; the table below shows the months where the two working days do meet.
Each city's working day
| City | Local hours | In UTC | Offset | Next clock change |
|---|---|---|---|---|
| Chicago | 09:00–17:00 | 14:00–22:00 UTC | UTC-05:00 | UTC-05:00 → UTC-06:00, 1 Nov 2026 |
| Athens | 09:00–17:00 | 06:00–14:00 UTC | UTC+03:00 | UTC+03:00 → UTC+02:00, 25 Oct 2026 |
How the shared window moves through the year
Chicago and Athens change clocks on different dates, so the gap between them moves twice a year. Each row is the same pair of working days, sampled once a month, so the window's size and position follow the clock changes described above.
| Month | Shared window | Length |
|---|---|---|
| 2026-10 | No shared hours | — |
| 2026-11 | No shared hours | — |
| 2026-12 | No shared hours | — |
| 2027-01 | No shared hours | — |
| 2027-02 | No shared hours | — |
| 2027-03 | 14:00–15:00 UTC | 1 hour |
| 2027-04 | No shared hours | — |
| 2027-05 | No shared hours | — |
| 2027-06 | No shared hours | — |
| 2027-07 | No shared hours | — |
| 2027-08 | No shared hours | — |
| 2027-09 | No shared hours | — |
Questions
- Is there any time Chicago and Athens are both at work?
- Not on Monday, 28 September 2026. Chicago works 14:00–22:00 UTC and Athens works 06:00–14:00 UTC, and those windows do not overlap. Widening one side's hours or choosing another date is what changes that.
- How far apart are Chicago and Athens?
- On Monday, 28 September 2026, Chicago is 8 hours behind Athens — UTC-05:00 against UTC+03:00. Chicago changes clocks on Sunday, 1 November 2026, and the gap between them goes from 7 hours to 8 hours. Athens changes clocks on Sunday, 25 October 2026, and the gap between them goes from 8 hours to 7 hours.
- Does the overlap between Chicago and Athens change through the year?
- The shared window is 14:00–15:00 UTC in the 1 of the twelve months from Monday, 28 September 2026 that have one; 11 have no shared window at all.
Related city pairs
- Honolulu and Chicago
- Honolulu and Athens
- San Francisco and Chicago
- San Francisco and Athens
- Denver and Chicago
- Denver and Athens
Or read how overlap is calculated and the other questions people ask about scheduling across time zones.