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CEST
Central European Summer Time
GMT +2
12am
3am
6am
9am
12pm
3pm
6pm
9pm
IRST/IRDT
Iran Standard Time
GMT +3:30
12am
3am
6am
9am
12pm
3pm
6pm
9pm
IRDT is not used on this date.

This converter uses IRST (UTC+3:30), as in Tehran.

Quick answers

Selected conversion

2:00 pm14:00 CEST (UTC+2), Oct 5, 2026 = 3:30 pm15:30 IRST (UTC+3:30), Oct 5, 2026

CEST is 1 hour and 30 minutes behind IRST.

CEST and IRDT examples

These examples always use CEST (UTC+2) and IRDT (UTC+4:30). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.

CEST is 2 hours and 30 minutes behind IRDT.

How the time difference changes

For most of the year, CEST is 1 hour and 30 minutes behind IRST. At other times of the year, CET is 2 hours and 30 minutes behind IRST.

For most of the year, working hours of 9:00 am to 5:00 pm in CEST correspond to 10:30 am to 6:30 pm in IRST. At other times of the year, working hours of 9:00 am to 5:00 pm in CET correspond to 11:30 am to 7:30 pm in IRST.For most of the year, working hours of 09:00 to 17:00 in CEST correspond to 10:30 to 18:30 in IRST. At other times of the year, working hours of 09:00 to 17:00 in CET correspond to 11:30 to 19:30 in IRST.

Compare CEST time with IRDT time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.

Time Difference

Central European Summer Time is 1 hour and 30 minutes behind Iran Standard Time.
2:00 pm14:00 in CEST is 3:30 pm15:30 in IRST

CEST to IRST call time
Best time for a conference call or a meeting is between 9am-3:30pm09:00-15:30 in CEST which corresponds to 10:30am-5pm10:30-17:00 in IRST

2:00 pm14:00 Central European Summer Time (CEST). Offset UTC +2:00 hours
3:30 pm15:30 Iran Standard Time (IRST). Offset UTC +3:30 hours

2:00 pm14:00 CEST / 3:30 pm15:30 IRST

CESTIRST
12:00am1:30am
1:00am2:30am
2:00am3:30am
3:00am4:30am
4:00am5:30am
5:00am6:30am
6:00am7:30am
7:00am8:30am
8:00am9:30am
9:00am10:30am
10:00am11:30am
11:00am12:30pm
12:00pm1:30pm
1:00pm2:30pm
2:00pm3:30pm
3:00pm4:30pm
4:00pm5:30pm
5:00pm6:30pm
6:00pm7:30pm
7:00pm8:30pm
8:00pm9:30pm
9:00pm10:30pm
10:00pm11:30pm
11:00pm12:30am
00:0001:30
01:0002:30
02:0003:30
03:0004:30
04:0005:30
05:0006:30
06:0007:30
07:0008:30
08:0009:30
09:0010:30
10:0011:30
11:0012:30
12:0013:30
13:0014:30
14:0015:30
15:0016:30
16:0017:30
17:0018:30
18:0019:30
19:0020:30
20:0021:30
21:0022:30
22:0023:30
23:0000:30

Central European Summer Time

Offset: CEST is 2 hours ahead Greenwich Mean Time (GMT) and is used in Europe

Countries using this time zone: Andorra, Albania, Austria, Bosnia & Herzegovina, Belgium, Switzerland, Czech Republic, Germany, Denmark, Spain, France, Gibraltar, Croatia, Hungary, Italy, Liechtenstein, Luxembourg, Monaco, Montenegro, North Macedonia, Malta, Netherlands, Norway, Poland, Serbia, Sweden, Slovenia, Svalbard & Jan Mayen, Slovakia, San Marino, Vatican City

Principal Cities: The largest city in the CEST time zone is Berlin in Germany, with about 3.426 million people. Other major cities in this time zone include Madrid, Rome, Paris, Hamburg.

German: MESZ - Mitteleuropäische Sommerzeit

CEST Time Zone Geo Map
CEST timezone map

Daylight Saving: Central European Summer Time (CEST) is a daylight saving/summer time zone. During winter, some places set clocks back one hour and observe Central European Time (CET).

Daylight saving time clock moves forward for one hourStart: Central European Summer Time (CEST) started on Sunday, March 29, 2026 at 2:00 am02:00 local time and clocks were set one hour forward to Sunday, March 29, 2026, 3:00 am03:00. Daylight saving starts annually on the last Sunday of March.

Daylight saving time clock moves back for one hourEnd: Central European Summer Time (CEST) ends on Sunday, October 25, 2026 at 3:00 am03:00 local time and clocks are set one hour back to Sunday, October 25, 2026, 2:00 am02:00 local standard time instead. Daylight saving ends annually on the last Sunday of October.

See upcoming clock changes worldwide.

CEST representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • +02 - basic short
  • +0200 - basic
  • +02:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +0200 - sign character (+) followed by a four digit time providing hours (02) and minutes (00) of the offset. Indicates an offset of two hours to the east of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Bravo - Military abbreviation for CEST
  • B - short form of 'Bravo'
IANA/Olson: Reflects CEST time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • Africa/Ceuta
  • Arctic/Longyearbyen
  • Atlantic/Jan_Mayen
  • CET
  • Europe/Amsterdam
  • Europe/Andorra
  • Europe/Belgrade
  • Europe/Berlin
  • Europe/Bratislava
  • Europe/Brussels
  • Europe/Budapest
  • Europe/Busingen
  • Europe/Copenhagen
  • Europe/Gibraltar
  • Europe/Ljubljana
  • Europe/Luxembourg
  • Europe/Madrid
  • Europe/Malta
  • Europe/Monaco
  • Europe/Oslo
  • Europe/Paris
  • Europe/Podgorica
  • Europe/Prague
  • Europe/Rome
  • Europe/San_Marino
  • Europe/Sarajevo
  • Europe/Skopje
  • Europe/Stockholm
  • Europe/Tirane
  • Europe/Vaduz
  • Europe/Vatican
  • Europe/Vienna
  • Europe/Warsaw
  • Europe/Zagreb
  • Europe/Zurich
  • MET
  • Poland
Time zones with the GMT +2 offset:
  • CEST - Central European Summer Time
  • EET - Eastern European Time
  • MESZ - Mitteleuropäische Sommerzeit
  • B - Bravo Time Zone
  • CAT - Central Africa Time
  • IST - Israel Standard Time
  • SAST - South Africa Standard Time
  • WAST - West Africa Summer Time

Iran Daylight Time

Offset: IRDT is 4 hours and 30 minutes ahead Greenwich Mean Time (GMT) and is used in Asia

IRDT Time Zone Geo Map
IRDT timezone map

IRDT representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • +0430 - basic
  • +04:30 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +0430 - sign character (+) followed by a four digit time providing hours (04) and minutes (30) of the offset. Indicates an offset of four hours and thirty minutes to the east of the zero meridian.
Time zones with the GMT +4:30 offset:
  • AFT - Afghanistan Time
  • IRDT - Iran Daylight Time