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IRST to PST Converter

IRST
Iran Standard Time
GMT +3:30
12am
3am
6am
9am
12pm
3pm
6pm
9pm
PST
Pacific Standard Time
GMT -8
12am
3am
6am
9am
12pm
3pm
6pm
9pm

Quick answers

IRST is 11 hours and 30 minutes ahead of PST. IRST uses GMT +3:30, and PST uses GMT -8 for this comparison.

For example, 3:30 pm IRST is 4:00 am PST. Use the converter above to adjust the date or time and create a shareable meeting link.

Best meeting overlap: 6:30pm-7:30pm IRST, which is 7am-8am PST.

PST is a fixed UTC-8 standard-time offset. For current Pacific Time, compare IRST to PDT or IRST to PT.

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

Time Difference

Iran Standard Time is 11 hours and 30 minutes ahead of Pacific Standard Time
3:30 pm15:30 in IRST is 4:00 am04:00 in PST

IRST to PST call time
Best time for a conference call or a meeting is between 6:30pm-7:30pm in IRST which corresponds to 7am-8am in PST

3:30 pm15:30 Iran Standard Time (IRST). Offset UTC +3:30 hours
4:00 am04:00 Pacific Standard Time (PST). Offset UTC -8:00 hours

3:30 pm15:30 IRST / 4:00 am04:00 PST

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

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.

Pacific Standard Time

Offset: PST is 8 hours behind Greenwich Mean Time (GMT) and is used in North America

Countries using this time zone: Canada, Mexico, United States

Principal Cities: The largest city in the PST time zone is Los Angeles in the United States, with about 3.793 million people. Other major cities in this time zone include Vancouver, Tijuana, San Diego, San Jose.

French: HNP - Heure Normale du Pacifique

Spanish: PT - Tiempo del Pacífico, PT - Zona Noroeste

PST Time Zone Geo Map
PST timezone map

Daylight Saving: This is a standard time zone. During summer, some places set clocks forward one hour for daylight saving time and observe Pacific Daylight Time (PDT).

Daylight saving time clock moves back for one hour from 2am to 1amStart: Pacific Standard Time (PST) started on Sunday, November 2, 2025 at 2:00 am local time and clocks were set one hour back to Sunday, November 2, 2025, 1:00 am. Standard time starts annually on the first Sunday of November.

Daylight saving time clock moves forward for one hour from 2am to 3amEnd: Pacific Standard Time (PST) ends on Sunday, March 8, 2026 at 2:00 am local time and clocks are set one hour forward to Sunday, March 8, 2026, 3:00 am local daylight time instead. Standard time ends annually on the second Sunday of March.

PST representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • -08 - basic short
  • -0800 - basic
  • -08:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • -0800 - sign character (-) followed by a four digit time providing hours (08) and minutes (00) of the offset. Indicates an offset of eight hours to the west of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Uniform - Military abbreviation for PST
  • U - short form of 'Uniform'
IANA/Olson: Reflects PST time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • America/Ensenada
  • America/Los_Angeles
  • America/Santa_Isabel
  • America/Tijuana
  • America/Vancouver
  • Canada/Pacific
  • Mexico/BajaNorte
  • PST8PDT
  • US/Pacific
PST Abbreviation: Several time zones share PST abbreviation and it could refer to these time zones
  • Pacific Standard Time - UTC -8
  • Pitcairn Standard Time - UTC -8
Time zones with the GMT -8 offset:
  • AKDT - Alaska Daylight Time
  • PST - Pacific Standard Time
  • PT - Pacific Time
  • PST - Pitcairn Standard Time
  • U - Uniform Time Zone
EST to ISTGMT to ESTPST to ESTEST to GMTPST to GMT