Offset
The time difference between Zürich and Tehran is 1.5 hours.
Zürich (CEST) is behind Tehran (IRST).
CEST: UTC+2
IRST: UTC+3:30
Zürich is currently observing daylight saving time; Tehran is not.
When to schedule
Business-hours overlap: 9 AM–4 PM in Zürich (10 AM–5 PM in Tehran).
Both teams are in working hours during this window on weekdays.
Suggested time: 12:00 PM Zürich (1:30 PM Tehran).
This window may shift by an hour during daylight saving time.
Public holidays in 2026
National public holidays can affect availability — a counterpart is likely off work on their own holidays, so it's worth planning meetings and deadlines around them.
Switzerland
- New Year's DayThu, Jan 1
- Ascension DayThu, May 14
- Swiss National DaySat, Aug 1
- Christmas DayFri, Dec 25
About these zones
Quick reference
Full 24-hour conversion table — tap any time to open it in the converter.
| Zürich | Tehran | Day |
|---|---|---|
| 12:00 am | 1:30 am | Same day |
| 1:00 am | 2:30 am | Same day |
| 2:00 am | 3:30 am | Same day |
| 3:00 am | 4:30 am | Same day |
| 4:00 am | 5:30 am | Same day |
| 5:00 am | 6:30 am | Same day |
| 6:00 am | 7:30 am | Same day |
| 7:00 am | 8:30 am | Same day |
| 8:00 am | 9:30 am | Same day |
| 9:00 am | 10:30 am | Same day |
| 10:00 am | 11:30 am | Same day |
| 11:00 am | 12:30 pm | Same day |
| 12:00 pm | 1:30 pm | Same day |
| 1:00 pm | 2:30 pm | Same day |
| 2:00 pm | 3:30 pm | Same day |
| 3:00 pm | 4:30 pm | Same day |
| 4:00 pm | 5:30 pm | Same day |
| 5:00 pm | 6:30 pm | Same day |
| 6:00 pm | 7:30 pm | Same day |
| 7:00 pm | 8:30 pm | Same day |
| 8:00 pm | 9:30 pm | Same day |
| 9:00 pm | 10:30 pm | Same day |
| 10:00 pm | 11:30 pm | Same day |
| 11:00 pm | 12:30 am | +1 day |
Daylight saving time
Zürich observes daylight saving time; Tehran does not. The offset between the two zones changes when Zürich transitions: on Sunday, October 25, 2026, clocks fall back from CEST to CET.
See the daylight saving time page for transition dates across every time zone.
Daylight today
- Sunrise
- 5:31 AM
- Sunset
- 9:21 PM
- Day length
- 15h 50m
- Sunrise
- 4:49 AM
- Sunset
- 7:19 PM
- Day length
- 14h 30m
Daylight overlap: 12h 18m — 5:31 AM–5:49 PM in Zürich (7:01 AM–7:19 PM in Tehran). Both locations are in daylight during this window.
Cities in these zones
Browse all cities to see the current local time anywhere.
Airports in these zones
Airports in Central European Time
- ZRH
- BRN
Airports in Iran Standard Time
- IKA
- THR
- MHD
- IFN
- PYK
- TBZ
Related conversions
Common conversions
- What is 9:00 am Zürich in Tehran?
- 9:00 am Zürich is 10:30 am Tehran.
- What is 12:00 pm Zürich in Tehran?
- 12:00 pm Zürich is 1:30 pm Tehran.
- What is 12:30 pm Zürich in Tehran?
- 12:30 pm Zürich is 2:00 pm Tehran.
- What is 2:00 pm Zürich in Tehran?
- 2:00 pm Zürich is 3:30 pm Tehran.
- What is 5:00 pm Zürich in Tehran?
- 5:00 pm Zürich is 6:30 pm Tehran.
- What is 11:30 pm Zürich in Tehran?
- 11:30 pm Zürich is 1:00 am Tehran, the next day.