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IRST
12am
3am
6am
9am
12pm
3pm
6pm
9pm
+05:00
UTC+5
1h 30m ahead
12am
3am
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9am
12pm
3pm
6pm
9pm

Quick answers

Selected conversion

3:30 pm15:30 IRST (UTC+3:30), Nov 11, 2026 = 5:00 pm17:00 +05:00 (UTC+5), Nov 11, 2026

IRST is 1 hour and 30 minutes behind +05:00.

IRST and +05:00 examples

These examples always use IRST (UTC+3:30) and +05:00 (UTC+5). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.

IRST is 1 hour and 30 minutes behind +05:00.

How the time difference changes

IRST is 1 hour and 30 minutes behind +05:00 year-round.

Working hours of 9:00 am to 6:00 pm in IRST correspond to 10:30 am to 7:30 pm in +05:00.Working hours of 09:00 to 18:00 in IRST correspond to 10:30 to 19:30 in +05:00.

Compare IRST time with +05:00 time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.

Time Difference

Iran Standard Time is 1 hour and 30 minutes behind +05:00 GMT.
3:30 pm15:30 in IRST is 5:00 pm17:00 in +05:00

IRST to +05:00 call time
Best time for a conference call or a meeting is between 9am-4:30pm09:00-16:30 in IRST which corresponds to 10:30am-6pm10:30-18:00 in +05:00.

3:30 pm15:30 Iran Standard Time (IRST). Offset UTC +3:30 hours
5:00 pm17:00 +05:00 GMT (+05:00). Offset UTC +5:00 hours

3:30 pm15:30 IRST / 5:00 pm17:00 +05:00

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Hourly time comparison
IRST+05:00
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12:30am next day
01:30
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00:30 next day

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

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • +0330 - basic
  • +03:30 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +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.

+05:00 GMT

Offset: +05:00 is 5 hours ahead of Greenwich Mean Time (GMT).

Countries using this time zone: Antarctica, French Southern Territories, Kazakhstan, Maldives, Pakistan, Russia, Tajikistan, Turkmenistan, Uzbekistan

Principal Cities: The largest city in the +05:00 time zone is Lahore in Pakistan, with about 13.004 million people. Other major cities in this time zone include Karachi, Peshawar, Faisalabad, Rawalpindi.

Daylight Saving: Clocks in +05:00 GMT (+05:00) do not change for daylight saving time, so +05:00 stays the same throughout the year. Other time zones may set clocks forward in summer and back in winter; see upcoming clock changes worldwide.

+05:00 representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • +05 - basic short
  • +0500 - basic
  • +05:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +0500 - sign character (+) followed by a four digit time providing hours (05) and minutes (00) of the offset. Indicates an offset of five hours to the east of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Echo - Military abbreviation for +05:00
  • E - short form of 'Echo'
Time zones with the GMT +5 offset:
  • ALMT - Alma-Ata Time
  • AMST - Armenia Summer Time
  • AQTT - Aqtobe Time
  • AZST - Azerbaijan Summer Time
  • E - Echo Time Zone
  • MAWT - Mawson Time
  • MVT - Maldives Time
  • ORAT - Oral Time
  • PKT - Pakistan Standard Time
  • QYZT - Qyzylorda Time
  • TFT - French Southern and Antarctic Time
  • TJT - Tajikistan Time
  • TMT - Turkmenistan Time
  • UZT - Uzbekistan Time
  • YEKT - Yekaterinburg Time
  • HMT - Heard and McDonald Islands Time