IRST to PST Converter
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Add one or more places to compare local times, adjust the date, and share the result.
Quick answers
Selected conversion
3:30 pm15:30 IRST (UTC+3:30), Oct 14, 2026 = 5:00 am05:00 PDT (UTC-7), Oct 14, 2026
IRST is 10 hours and 30 minutes ahead of PDT.
IRST and PST (US winter time, UTC-8) examples
These examples always use IRST (UTC+3:30) and PST (UTC-8). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.
IRST is 11 hours and 30 minutes ahead of PST.
PST is US Pacific winter time (early November to mid-March). The rest of the year Los Angeles uses PDT (UTC-7), one hour later. For Pacific Time that follows daylight saving time, use IRST to PT. For daylight-time examples, use IRST to PDT.
How the time difference changes
For most of the year, IRST is 10 hours and 30 minutes ahead of PDT. From Nov 1, 2026 to Mar 14, 2027, IRST is 11 hours and 30 minutes ahead of PST.
For most of the year, working hours of 9:00 am to 5:00 pm in IRST correspond to 10:30 pm (previous day) to 6:30 am in PDT. At other times of the year, working hours of 9:00 am to 5:00 pm in IRST correspond to 9:30 pm (previous day) to 5:30 am in PST.For most of the year, working hours of 09:00 to 17:00 in IRST correspond to 22:30 (previous day) to 06:30 in PDT. At other times of the year, working hours of 09:00 to 17:00 in IRST correspond to 21:30 (previous day) to 05:30 in PST.
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 10 hours and 30 minutes ahead of Pacific Daylight Time.
3:30 pm15:30 in IRST is 5:00 am05:00 in PDT
IRST to PDT call time
Best time for a conference call or a meeting is between 6pm-7pm18:00-19:00 in IRST which corresponds to 7:30am-8:30am07:30-08:30 in PDT. Their 9am–5pm09:00–17:00 working hours do not overlap; this is a suggested compromise.
3:30 pm15:30 Iran Standard Time (IRST). Offset UTC +3:30 hours
5:00 am05:00 Pacific Daylight Time (PDT). Offset UTC -7:00 hours
3:30 pm15:30 IRST / 5:00 am05:00 PDT
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.
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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.
Pacific Standard Time
Offset: PST is 8 hours behind Greenwich Mean Time (GMT).
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 3.821 million people. Other major cities in this time zone include Tijuana, San Diego, Mexicali, San Jose.
French: HNP - Heure Normale du Pacifique
Spanish: PT - Tiempo del Pacífico, PT - Zona Noroeste
Today the shaded areas are on UTC−7 (PDT).
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).
End: Pacific Standard Time (PST) ended on Sunday, March 8, 2026 at 2:00 am02:00 local time and clocks were set one hour forward to Sunday, March 8, 2026, 3:00 am03:00 local daylight time instead. Standard time ends annually on the second Sunday of March.
Start: Pacific Standard Time (PST) starts on Sunday, November 1, 2026 at 2:00 am02:00 local time and clocks are set one hour back to Sunday, November 1, 2026, 1:00 am01:00. Standard time starts annually on the first Sunday of November.
PST representations, usage and related time zones
- -08 - basic short
- -0800 - basic
- -08:00 - extended
- -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.
- Uniform - Military abbreviation for PST
- U - short form of 'Uniform'
- America/Ensenada
- America/Los_Angeles
- America/Santa_Isabel
- America/Tijuana
- America/Vancouver
- Canada/Pacific
- Mexico/BajaNorte
- PST8PDT
- US/Pacific
- Pacific Standard Time - UTC -8
- Pitcairn Standard Time - UTC -8
- AKDT - Alaska Daylight Time
- PST - Pacific Standard Time
- PT - Pacific Time
- PST - Pitcairn Standard Time
- U - Uniform Time Zone