Convert Iran Standard Time to Pacific Daylight Time
Instantly convert Iran Standard Time (IRST) to Pacific Daylight Time (PDT) with our free online calculator.
Iran Standard Time
08:50:59 AM
Wed, Jun 24 (IRST)
Pacific Daylight Time
10:20:59 PM
Tue, Jun 23 (PDT)
Convert a Specific Time
24-Hour Comparison
| IRST | PDT |
|---|---|
| 12:00 AM | 1.5:00 PM(-1d) |
| 1:00 AM | 2.5:00 PM(-1d) |
| 2:00 AM | 3.5:00 PM(-1d) |
| 3:00 AM | 4.5:00 PM(-1d) |
| 4:00 AM | 5.5:00 PM(-1d) |
| 5:00 AM | 6.5:00 PM(-1d) |
| 6:00 AM | 7.5:00 PM(-1d) |
| 7:00 AM | 8.5:00 PM(-1d) |
| 8:00 AM | 9.5:00 PM(-1d) |
| 9:00 AM | 10.5:00 PM(-1d) |
| 10:00 AM | 11.5:00 PM(-1d) |
| 11:00 AM | 0.5:00 AM |
| 12:00 PM | 1.5:00 AM |
| 1:00 PM | 2.5:00 AM |
| 2:00 PM | 3.5:00 AM |
| 3:00 PM | 4.5:00 AM |
| 4:00 PM | 5.5:00 AM |
| 5:00 PM | 6.5:00 AM |
| 6:00 PM | 7.5:00 AM |
| 7:00 PM | 8.5:00 AM |
| 8:00 PM | 9.5:00 AM |
| 9:00 PM | 10.5:00 AM |
| 10:00 PM | 11.5:00 AM |
| 11:00 PM | 0.5:00 PM |
How to Convert Iran Standard Time to Pacific Daylight Time
Formula
To convert Iran Standard Time (IRST) to Pacific Daylight Time (PDT): Convert IRST to PDT
About Iran Standard Time (IRST)
Iran Standard Time (IRST, IANA: Asia/Tehran) is the civil time of the Islamic Republic of Iran, set at UTC+3:30 — one of the world's few 30-minute-offset time zones. IRST observes Daylight Saving Time (switching to IRDT = UTC+4:30) from the last Wednesday of the Iranian month of Farvardin (~March 22) to the last Wednesday of Shahrivar (~September 22) per Iranian government calendar (the country abolished DST in 2022 then partially reinstated it for energy savings — the schedule is subject to change by Iranian Parliament Majlis decree). The 30-minute offset is preserved because Iran's central meridian is approximately 52.5°E, between UTC+3 and UTC+4 standard zones, and the Iranian Solar Hijri calendar has its own astronomical traditions for time-keeping. IRST serves approximately 88 million Iranian people across 31 provinces. Major cities: Tehran (8.7M city, 13M metro — capital), Mashhad (3.1M), Isfahan (2.2M), Karaj (1.6M), Shiraz (1.6M), Tabriz (1.6M), Qom (1.2M). Other 30/45-minute offset zones: India (UTC+5:30), Nepal (UTC+5:45), Myanmar (UTC+6:30), Newfoundland (UTC-3:30), Afghanistan (UTC+4:30), Marquesas (UTC-9:30). Affects: Tehran Stock Exchange (TSE) trading, Iranian Solar Hijri New Year Nowruz celebrations.
About Pacific Daylight Time (PDT)
Pacific Daylight Time (PDT, IANA: America/Los_Angeles during DST window) is the summer-time variant of PST, set at UTC-7:00 — observed from the second Sunday in March to the first Sunday in November per the Energy Policy Act of 2005, which extended the US DST window by ~4 weeks compared to the prior Uniform Time Act of 1966 schedule. PDT is the same offset as Mountain Standard Time (MST), creating a confusing situation where Arizona (which doesn't observe DST and stays on MST year-round) shares the same clock as California during summer months but is one hour behind during winter. PDT is used by ~50 million people in California, Oregon, Washington, Nevada, British Columbia, Yukon, and Baja California Norte. Affects: West-Coast NYSE/Nasdaq market open shifts to 06:30 PDT, professional sports West Coast game-time broadcasts to East Coast PDT prime time, and US Pacific Fleet operations from Naval Base San Diego.