IRST
Iran Standard Time
GMT +3:30
12am
3am
6am
9am
12pm
3pm
6pm
9pm
MSK
Moscow Standard Time
GMT +3
12am
3am
6am
9am
12pm
3pm
6pm
9pm

Quick answers

IRST is 30 minutes ahead of MSK. IRST uses GMT +3:30, and MSK uses GMT +3 for this comparison.

For example, 3:30 pm IRST is 3:00 pm MSK. Use the converter above to adjust the date or time and create a shareable meeting link.

Best meeting overlap: 9:30am-5pm IRST, which is 9am-4:30pm MSK.

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

Time Difference

Iran Standard Time is 0 hours and 30 minutes ahead of Moscow Standard Time
3:30 pm15:30 in IRST is 3:00 pm15:00 in MSK

IRST to MSK call time
Best time for a conference call or a meeting is between 9:30am-5pm in IRST which corresponds to 9am-4:30pm in MSK

3:30 pm15:30 Iran Standard Time (IRST). Offset UTC +3:30 hours
3:00 pm15:00 Moscow Standard Time (MSK). Offset UTC +3:00 hours

3:30 pm15:30 IRST / 3:00 pm15:00 MSK

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

Iran Standard Time

Offset: IRST is 3 hours and 30 minutes ahead Greenwich Mean Time (GMT) and is used in Asia

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.

IRST Time Zone Geo Map
IRST timezone map

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.

Moscow Standard Time

Offset: MSK is 3 hours ahead Greenwich Mean Time (GMT) and is used in Europe

Countries using this time zone: Russia, Ukraine

Principal Cities: The largest city in the MSK time zone is Moscow in Russia, with about 10.381 million people. Other major cities in this time zone include Saint Petersburg, Nizhniy Novgorod, Kazan, Rostov na Donu.

Daylight Saving: Clocks in Moscow Standard Time (MSK) do not change for daylight saving time, so MSK stays the same throughout the year. Other time zones may set clocks forward in summer and back in winter.

MSK Time Zone Geo Map
MSK timezone map

MSK representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • +03 - basic short
  • +0300 - basic
  • +03:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +0300 - sign character (+) followed by a four digit time providing hours (03) and minutes (00) of the offset. Indicates an offset of three hours to the east of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Charlie - Military abbreviation for MSK
  • C - short form of 'Charlie'
IANA/Olson: Reflects MSK time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • Europe/Kirov
  • Europe/Moscow
  • Europe/Simferopol
  • Europe/Volgograd
  • W-SU
Time zones with the GMT +3 offset:
  • EEST - Eastern European Summer Time
  • MSK - Moscow Standard Time
  • AST - Arabia Standard Time
  • C - Charlie Time Zone
  • EAT - Eastern Africa Time
  • FET - Further Eastern European Time
  • IDT - Israel Daylight Time
  • TRT - Turkey Time