Convert Iran Standard Time to Western Indonesian Time
Instantly convert Iran Standard Time (IRST) to Western Indonesian Time (WIB) with our free online calculator.
Iran Standard Time
08:50:49 AM
Wed, Jun 24 (IRST)
Western Indonesian Time
12:20:49 PM
Wed, Jun 24 (WIB)
Convert a Specific Time
24-Hour Comparison
| IRST | WIB |
|---|---|
| 12:00 AM | 3.5:00 AM |
| 1:00 AM | 4.5:00 AM |
| 2:00 AM | 5.5:00 AM |
| 3:00 AM | 6.5:00 AM |
| 4:00 AM | 7.5:00 AM |
| 5:00 AM | 8.5:00 AM |
| 6:00 AM | 9.5:00 AM |
| 7:00 AM | 10.5:00 AM |
| 8:00 AM | 11.5:00 AM |
| 9:00 AM | 0.5:00 PM |
| 10:00 AM | 1.5:00 PM |
| 11:00 AM | 2.5:00 PM |
| 12:00 PM | 3.5:00 PM |
| 1:00 PM | 4.5:00 PM |
| 2:00 PM | 5.5:00 PM |
| 3:00 PM | 6.5:00 PM |
| 4:00 PM | 7.5:00 PM |
| 5:00 PM | 8.5:00 PM |
| 6:00 PM | 9.5:00 PM |
| 7:00 PM | 10.5:00 PM |
| 8:00 PM | 11.5:00 PM |
| 9:00 PM | 0.5:00 AM(+1d) |
| 10:00 PM | 1.5:00 AM(+1d) |
| 11:00 PM | 2.5:00 AM(+1d) |
How to Convert Iran Standard Time to Western Indonesian Time
Formula
To convert Iran Standard Time (IRST) to Western Indonesian Time (WIB): Convert IRST to WIB
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 Western Indonesian Time (WIB)
Western Indonesian Time (WIB — Waktu Indonesia Barat, IANA: Asia/Jakarta) is the civil time of western Indonesia, set at UTC+7:00 year-round (no DST). Indonesia spans 3 time zones (WIB UTC+7, WITA UTC+8, WIT UTC+9) covering its 17,508+ island archipelago across ~5,000 km of longitude — the world's largest archipelagic country by area. WIB serves approximately 200 million Indonesian people on Java, Sumatra, West Kalimantan, and Central Kalimantan — including the major population centers. WIB is identical in offset to Indochina Time (ICT) used by mainland Thailand/Vietnam/Cambodia/Laos. Major WIB cities: Jakarta (10.5M city, 35M metro — Indonesia's capital and Southeast Asia's largest metro after Tokyo/Delhi/Shanghai/Manila), Surabaya (2.9M city, 9.3M metro — East Java capital), Medan (2.4M — Sumatra), Bandung (2.5M — West Java), Bekasi (3M — Jakarta satellite city), Tangerang (2.4M — Jakarta satellite), Depok (2.4M — Jakarta satellite), Semarang (1.7M — Central Java), Palembang (1.7M — Sumatra). Affects: IDX (Indonesia Stock Exchange) trading hours, Jakarta KRL commuter-rail schedules, Borobudur Buddhist temple + Prambanan Hindu temple tourism schedules.