WIB to Tehran
-3h 30mWIB
WIBSOURCETehran
IRSTGreen rows indicate typical business hours (9 AM - 5 PM)
WIB and IRST on the World Map
The map below highlights the WIB (Western Indonesia Time) and IRST (Iran Standard Time) timezone regions across the globe.
WIB – Western Indonesia Time
UTC+07:00Western Indonesia Time (WIB, UTC+07:00) covers Java, Sumatra and West Kalimantan, including Jakarta.
- •Indonesia spans three time zones: WIB (UTC+07:00), WITA (UTC+08:00) and WIT (UTC+09:00).
- •Indonesia has not observed daylight saving time since 1964.
- •Jakarta is the largest city in Southeast Asia by population.
- •WIB shares the UTC+07:00 offset with Indochina Time.
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.
About Tehran
WikipediaTehran operates on Iran Standard Time (IRST), UTC+3:30. Iran's unique half-hour offset makes Tehran time distinctive for regional business coordination.
Iran Standard Time (IRST) is one of few timezones with a 30-minute offset (UTC+3:30).
Time Conversion Guide: WIB to Tehran
WIB runs on Western Indonesia Time (WIB) at UTC+07:00. Tehran runs on Iran Standard Time (IRST) at UTC+03:30. That puts WIB 3 hours 30 minutes behind Tehran — a difference of -3h 30m at the current offsets.
In practice, when it is 9:00 AM in WIB it is 5:30 AM in Tehran. Midnight in WIB is 8:30 PM in Tehran. Neither zone observes daylight saving time, so the offset between them stays constant all year.
WIB to Tehran time conversion table
| WIB (WIB) | Tehran (IRST) | Day |
|---|---|---|
| 12:00 AM | 8:30 PM | previous day |
| 6:00 AM | 2:30 AM | same day |
| 7:00 AM | 3:30 AM | same day |
| 8:00 AM | 4:30 AM | same day |
| 9:00 AM | 5:30 AM | same day |
| 12:00 PM | 8:30 AM | same day |
| 3:00 PM | 11:30 AM | same day |
| 5:00 PM | 1:30 PM | same day |
| 6:00 PM | 2:30 PM | same day |
| 9:00 PM | 5:30 PM | same day |
Why people convert WIB to Tehran time
- Scheduling a call from WIB to Tehran: a 10:00 AM start in WIB lands at 6:30 AM in Tehran, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both WIB and Tehran are inside the 9-to-5 working day between 12:30 PM and 5:00 PM WIB time (9:00 AM–1:30 PM IRST). That is roughly 4 hours 30 minutes of usable overlap.
- Booking travel or deliveries: tracking Tehran local time against WIB keeps pickup windows and arrival estimates honest across the -3h 30m offset.
- Always state the zone abbreviation, not just the hour. "3:00 PM WIB" is unambiguous; "3 PM" across a -3h 30m gap is not.
- Block 12:30 PM–5:00 PM WIB as the recurring meeting window if you work primarily from WIB and need Tehran colleagues present.
About WIB (Western Indonesia Time)
Western Indonesia Time (WIB, Waktu Indonesia Barat) is one of Indonesia's three time zones, fixed at UTC+07:00 all year. It covers Java, Sumatra, West Kalimantan and the provinces around them — home to Jakarta, the country's capital and largest city, plus Surabaya and Bandung. Indonesia does not observe daylight saving time, so WIB never shifts. WIB shares its UTC+07:00 offset with Indochina Time (ICT) and Christmas Island Time, but is a distinct zone covering the western half of the Indonesian archipelago. The country's other zones are WITA (UTC+08:00) in the centre and WIT (UTC+09:00) in the east.
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.
Best time to call between WIB and Tehran
Both WIB and Tehran sit inside the 9 AM – 5 PM working day between 12:30 PM–5:00 PM WIB, which is 9:00 AM–1:30 PM IRST. That gives roughly 4 hours and 30 minutes of shared time — the safest window for a live call or meeting.
Business hours overlap
WIB and Tehran overlap for about 4 hours during the working day — enough for meetings if you avoid the edges of the window.
WIB is 3 hours 30 minutes behind Tehran (WIB UTC+07:00 → IRST UTC+03:30). The shared working window is 12:30 PM–5:00 PM WIB. Remember to re-check around daylight-saving transitions.
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 WIB and Tehran?
WIB (WIB, UTC+07:00) is 3 hours 30 minutes behind Tehran (IRST, UTC+03:30). The gap is currently -3h 30m.
How do I convert WIB time to Tehran time?
Add -3h 30m to WIB local time. For example, 9:00 AM in WIB is 5:30 AM in Tehran.
What time is it in Tehran right now?
Tehran uses IRST at UTC+03:30. Use the live converter at the top of this page — it updates in real time and already accounts for the -3h 30m offset from WIB.
What is the best time to call Tehran from WIB?
Call between 12:30 PM and 5:00 PM WIB — that maps to 9:00 AM–1:30 PM IRST and keeps both parties inside the working day.
Which is behind, WIB or Tehran?
WIB is 3 hours 30 minutes behind Tehran. When it is 12:00 PM in WIB it is 8:30 AM in Tehran.
Do WIB and Tehran use different time zones?
WIB uses WIB at UTC+07:00, while Tehran (Iran) uses IRST at UTC+03:30. The IANA identifiers are Asia/Jakarta and Asia/Tehran.
Does daylight saving time affect the WIB–Tehran difference?
Neither zone observes daylight saving time, so the -3h 30m offset between WIB and Tehran is fixed all year.
Which other cities share WIB's time zone?
WIB also covers Jakarta, Surabaya, Bandung, Medan, Palembang.
Which countries use WIB, WIB's zone?
WIB is used in Indonesia (Java, Sumatra, West Kalimantan).
Is there a day difference between WIB and Tehran?
Not normally. The -3h 30m gap only pushes the date over the previous day.
What is the time difference between WIB and Tehran?
Tehran is -3h 30m from WIB.
What timezone is WIB in?
WIB operates on its local timezone.
What timezone is Tehran in?
Tehran operates on Iran Standard Time (IRST), UTC+3:30. Iran's unique half-hour offset makes Tehran time distinctive for regional business coordination.
What are the business hours in Tehran?
Standard business hours in Tehran are 8:00 AM - 4:00 PM IRST.
Which countries use WIB (Western Indonesia Time)?
WIB is used in Indonesia (Java, Sumatra, West Kalimantan).
Does WIB observe daylight saving time?
No, WIB does not observe daylight saving time and remains at UTC+07:00 year-round.
What are some interesting facts about WIB?
Indonesia spans three time zones: WIB (UTC+07:00), WITA (UTC+08:00) and WIT (UTC+09:00). Indonesia has not observed daylight saving time since 1964.
Which cities are in the IRST timezone?
Major cities in the IRST timezone include Tehran, Isfahan, Mashhad, Tabriz, Shiraz, Karaj.
What is the UTC offset for IRST?
Iran Standard Time (IRST) is at UTC+03:30. During daylight saving time, it shifts to IRDT.
What should I know about the IRST timezone?
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).
When is it midnight in WIB, what time is it in Tehran?
When it is 12:00 AM (midnight) in WIB (WIB), it is -3h 30m later in Tehran (IRST).
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