IRST to Los Angeles
-10h 30mIRST
IRSTSOURCELos Angeles
PDTGreen rows indicate typical business hours (9 AM - 5 PM)
IRST and PDT on the World Map
The map below highlights the IRST (Iran Standard Time) and PDT (Pacific Standard Time) timezone regions across the globe.
IRST – Iran Standard Time
UTC+03:30Iran Standard Time (IRST) is the time zone for Iran, 3 hours and 30 minutes ahead of UTC.
- •IRST is one of only a few time zones with a 30-minute offset.
- •Iran observes daylight saving time, switching to IRDT (UTC+04:30).
- •Tehran has a metropolitan population of over 16 million.
PST – Pacific Standard Time
UTC-08:00Pacific Standard Time (PST) is the time zone for the US and Canadian Pacific coast, 8 hours behind UTC.
- •Silicon Valley and the world's biggest tech companies operate on Pacific Time.
- •The Hollywood film industry runs on PST/PDT.
- •PST is 3 hours behind EST, creating a significant business hours gap.
- •Vancouver, Canada's third-largest city, uses PST.
About Los Angeles
WikipediaLos Angeles operates on Pacific Time (PST/PDT), 3 hours behind New York. As the entertainment capital, LA time is important for media and tech industries.
Los Angeles is the entertainment capital of the world, home to Hollywood and major film studios.
Time Conversion Guide: IRST to Los Angeles
IRST runs on Iran Standard Time (IRST) at UTC+03:30. Los Angeles runs on Pacific Daylight Time (PDT) at UTC-07:00, also currently on daylight saving time. That puts IRST 10 hours 30 minutes behind Los Angeles — a difference of -10h 30m at the current offsets.
In practice, when it is 9:00 AM in IRST it is 10:30 PM in Los Angeles on the previous day. Midnight in IRST is 1:30 PM in Los Angeles.Los Angeles observes daylight saving time while IRST does not, so the gap narrows or widens by an hour part of the year.
IRST to Los Angeles time conversion table
| IRST (IRST) | Los Angeles (PDT) | Day |
|---|---|---|
| 12:00 AM | 1:30 PM | previous day |
| 6:00 AM | 7:30 PM | previous day |
| 7:00 AM | 8:30 PM | previous day |
| 8:00 AM | 9:30 PM | previous day |
| 9:00 AM | 10:30 PM | previous day |
| 12:00 PM | 1:30 AM | same day |
| 3:00 PM | 4:30 AM | same day |
| 5:00 PM | 6:30 AM | same day |
| 6:00 PM | 7:30 AM | same day |
| 9:00 PM | 10:30 AM | same day |
Why people convert IRST to Los Angeles time
- Scheduling a call from IRST to Los Angeles: a 10:00 AM start in IRST lands at 11:30 PM in Los Angeles the previous day, so you can confirm the slot without doing the arithmetic yourself.
- Handling a -10h 30m gap: IRST and Los Angeles have no overlap inside a normal 9-to-5 day, so real-time meetings need an early-morning or late-evening slot on one side. 9:00 AM in Los Angeles is 10:30 PM in IRST.
- Booking travel or deliveries: tracking Los Angeles local time against IRST keeps pickup windows and arrival estimates honest across the -10h 30m offset.
- Always state the zone abbreviation, not just the hour. "3:00 PM IRST" is unambiguous; "3 PM" across a -10h 30m gap is not.
- With a -10h 30m gap there is no shared 9-to-5 window, so alternate the early start: one week IRST takes the early slot, the next week Los Angeles does.
- Los Angeles: Clocks fall back on Sun, Nov 1, 2026. Any meeting series spanning that date will shift by an hour in local time.
About IRST (Iran Standard Time)
Iran Standard Time (IRST) is one of the few time zones with a 30-minute offset. Iran observes daylight saving time (IRDT, UTC+04:30) from late March to late September. Tehran, the capital, is one of the largest cities in the Middle East.
About PST (Pacific Standard Time)
Pacific Standard Time (PST) covers the west coast of North America, including tech hubs like San Francisco and Seattle, and entertainment capital Los Angeles. The Pacific Time Zone is home to Silicon Valley and the world's largest technology companies. During summer, clocks advance to Pacific Daylight Time (PDT, UTC-07:00). PST is also observed in Baja California, Mexico.
Best time to call between IRST and Los Angeles
With a -10h 30m offset there is no overlap inside a normal 9 AM – 5 PM day. Los Angeles opens at 9:00 AM PDT, which is 10:30 PM in IRST, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
IRST and Los Angeles have no shared working hours because of the -10h 30m gap. Teams need to alternate early starts or rely on asynchronous handovers.
IRST is 10 hours 30 minutes behind Los Angeles (IRST UTC+03:30 → PDT UTC-07:00). There is no shared 9-to-5 window, so plan around an early or late slot. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
IRST
Does not observe DST
Los Angeles
☀ Currently in DST
Standard: UTC-08:00 · DST: UTC-07:00
Clocks fall back on Sun, Nov 1, 2026
Learn More About Time
Dive deeper into the fascinating world of timekeeping, time zones, and how they shape our global society:
Frequently Asked Questions
What is the time difference between IRST and Los Angeles?
IRST (IRST, UTC+03:30) is 10 hours 30 minutes behind Los Angeles (PDT, UTC-07:00). The gap is currently -10h 30m.
How do I convert IRST time to Los Angeles time?
Add -10h 30m to IRST local time. For example, 9:00 AM in IRST is 10:30 PM in Los Angeles (previous day).
What time is it in Los Angeles right now?
Los Angeles uses PDT at UTC-07:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -10h 30m offset from IRST.
What is the best time to call Los Angeles from IRST?
There is no shared working-hours window because of the -10h 30m gap. The closest option is 1:00 PM in IRST, which is 2:30 AM in Los Angeles.
Which is behind, IRST or Los Angeles?
IRST is 10 hours 30 minutes behind Los Angeles. When it is 12:00 PM in IRST it is 1:30 AM in Los Angeles.
Do IRST and Los Angeles use different time zones?
IRST uses IRST at UTC+03:30, while Los Angeles (USA) uses PDT at UTC-07:00. The IANA identifiers are Asia/Tehran and America/Los_Angeles.
Does daylight saving time affect the IRST–Los Angeles difference?
Yes at the moment: Los Angeles is on daylight saving time and IRST is not, so the -10h 30m gap shifts by an hour when exactly one of them changes clocks.
Which other cities share IRST's time zone?
IRST also covers Tehran, Isfahan, Mashhad, Tabriz, Shiraz, Karaj.
Which countries use IRST, IRST's zone?
IRST is used in Iran.
Is there a day difference between IRST and Los Angeles?
Not normally. The -10h 30m gap only pushes the date over the previous day.
What is the time difference between IRST and Los Angeles?
Los Angeles is -10h 30m from IRST.
What timezone is IRST in?
IRST operates on its local timezone.
What timezone is Los Angeles in?
Los Angeles operates on Pacific Time (PST/PDT), 3 hours behind New York. As the entertainment capital, LA time is important for media and tech industries.
What are the business hours in Los Angeles?
Standard business hours in Los Angeles are 9:00 AM - 5:00 PM PST.
Which countries use IRST (Iran Standard Time)?
IRST is used in Iran.
Does IRST observe daylight saving time?
Yes, IRST switches to IRDT during summer months.
What are some interesting facts about IRST?
IRST is one of only a few time zones with a 30-minute offset. Iran observes daylight saving time, switching to IRDT (UTC+04:30).
Which cities are in the PST timezone?
Major cities in the PST timezone include Los Angeles, San Francisco, Seattle, Vancouver, San Diego, Portland, Las Vegas, Sacramento.
What is the UTC offset for PST?
Pacific Standard Time (PST) is at UTC-08:00. During daylight saving time, it shifts to PDT.
What should I know about the PST timezone?
Silicon Valley and the world's biggest tech companies operate on Pacific Time. The Hollywood film industry runs on PST/PDT.
When is it midnight in IRST, what time is it in Los Angeles?
When it is 12:00 AM (midnight) in IRST (IRST), it is -10h 30m later in Los Angeles (PST).
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