IST Israel to IRST Converter
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Quick answers
Selected conversion
3:00 pm15:00 IDT (UTC+3), Oct 23, 2026 = 3:30 pm15:30 IRST (UTC+3:30), Oct 23, 2026
IDT is 30 minutes behind IRST.
IST and IRST examples
These examples always use IST (UTC+2) and IRST (UTC+3:30). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.
IST is 1 hour and 30 minutes behind IRST.
How the time difference changes
For most of the year, IDT Israel is 30 minutes behind IRST. From Oct 25, 2026 to Mar 26, 2027, IST Israel is 1 hour and 30 minutes behind IRST.
For most of the year, working hours of 9:00 am to 6:00 pm in IDT Israel correspond to 9:30 am to 6:30 pm in IRST. At other times of the year, working hours of 9:00 am to 6:00 pm in IST Israel correspond to 10:30 am to 7:30 pm in IRST.For most of the year, working hours of 09:00 to 18:00 in IDT Israel correspond to 09:30 to 18:30 in IRST. At other times of the year, working hours of 09:00 to 18:00 in IST Israel correspond to 10:30 to 19:30 in IRST.
Compare IST time with IRST time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.
Time Difference
Israel Daylight Time is 30 minutes behind Iran Standard Time.
3:00 pm15:00 in IDT is 3:30 pm15:30 in IRST
IDT to IRST call time
Best time for a conference call or a meeting is between 9am-5:30pm09:00-17:30 in IDT which corresponds to 9:30am-6pm09:30-18:00 in IRST
3:00 pm15:00 Israel Daylight Time (IDT). Offset UTC +3:00 hours
3:30 pm15:30 Iran Standard Time (IRST). Offset UTC +3:30 hours
3:00 pm15:00 IDT / 3:30 pm15:30 IRST
Choose an hour to update the converter. Day labels such as “next day” or “+1” are relative to the selected date in the first column. Use Up and Down arrow keys, Home or End to move between hours, then Enter or Space to select.
| IDT | IRST |
|---|---|
| 12:30am | |
| 1:30am | |
| 2:30am | |
| 3:30am | |
| 4:30am | |
| 5:30am | |
| 6:30am | |
| 7:30am | |
| 8:30am | |
| 9:30am | |
| 10:30am | |
| 11:30am | |
| 12:30pm | |
| 1:30pm | |
| 2:30pm | |
| 3:30pm | |
| 4:30pm | |
| 5:30pm | |
| 6:30pm | |
| 7:30pm | |
| 8:30pm | |
| 9:30pm | |
| 10:30pm | |
| 11:30pm | |
| 00:30 | |
| 01:30 | |
| 02:30 | |
| 03:30 | |
| 04:30 | |
| 05:30 | |
| 06:30 | |
| 07:30 | |
| 08:30 | |
| 09:30 | |
| 10:30 | |
| 11:30 | |
| 12:30 | |
| 13:30 | |
| 14:30 | |
| 15:30 | |
| 16:30 | |
| 17:30 | |
| 18:30 | |
| 19:30 | |
| 20:30 | |
| 21:30 | |
| 22:30 | |
| 23:30 |
Israel Standard Time
Offset: IST is 2 hours ahead of Greenwich Mean Time (GMT).
Countries using this time zone: Israel
Principal Cities: The largest city in the IST time zone is Jerusalem in Israel, with about 971,800 people. Other major cities in this time zone include Tel Aviv, Haifa, Rishon LeTsiyyon, Petaẖ Tiqva.
Today the shaded areas are on UTC+3 (IDT).
Daylight Saving: This is a standard time zone. During summer, some places set clocks forward one hour for daylight saving time and observe Israel Daylight Time (IDT).
End: Israel Standard Time (IST) ended on Friday, March 27, 2026 at 2:00 am02:00 local time and clocks were set one hour forward to Friday, March 27, 2026, 3:00 am03:00 local daylight time instead.
Start: Israel Standard Time (IST) starts on Sunday, October 25, 2026 at 2:00 am02:00 local time and clocks are set one hour back to Sunday, October 25, 2026, 1:00 am01:00. Standard time starts annually on the last Sunday of October.
See Israel daylight saving time and upcoming clock changes worldwide.
IST representations, usage and related time zones
- +02 - basic short
- +0200 - basic
- +02:00 - extended
- +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.
- Bravo - Military abbreviation for IST
- B - short form of 'Bravo'
- Asia/Jerusalem
- Asia/Tel_Aviv
- Israel
- India Standard Time - UTC +5:30
- Irish Standard Time - UTC +1
- Israel Standard Time - UTC +2
- 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 Standard Time
Offset: IRST is 3 hours and 30 minutes ahead of Greenwich Mean Time (GMT).
Countries using this time zone: Iran
Principal Cities: The largest city in the IRST time zone is Tehran in Iran, with about 7.153 million people. Other major cities in this time zone include Mashhad, Isfahan, Karaj, Tabriz.
Daylight Saving: Clocks in Iran Standard Time (IRST) do not change for daylight saving time, so IRST stays the same throughout the year. Other time zones may set clocks forward in summer and back in winter; see upcoming clock changes worldwide.
IRST representations, usage and related time zones
- +0330 - basic
- +03:30 - extended
- +0330 - sign character (+) followed by a four digit time providing hours (03) and minutes (30) of the offset. Indicates an offset of three hours and thirty minutes to the east of the zero meridian.