Does it account for Daylight Saving Time?

Yes, our converter uses the IANA timezone database, which includes all current DST rules for every timezone in the world.

UTC (Coordinated Universal Time) is the primary time standard by which the world regulates clocks. All timezones are defined as offsets from UTC.

Can I compare multiple timezones at once?

Yes, you can add multiple cities or timezones and see the equivalent times side by side.

How many timezones are there in the world?

There are 38 distinct UTC offsets in use, ranging from UTC-12 to UTC+14. This includes half-hour (UTC+5:30 India, UTC+9:30 Australia) and 45-minute offsets (UTC+5:45 Nepal, UTC+8:45 Australia).

What is the International Date Line?

The International Date Line (IDL) runs roughly along the 180° meridian in the Pacific Ocean. When you cross it westward, you gain a day; crossing eastward, you lose a day.

Why do some timezones have 30 or 45 minute offsets?

Countries chose offsets that best matched their solar noon. India uses UTC+5:30 and Nepal uses UTC+5:45 because standard hourly offsets didn't align well with their geography.

Which country has the most timezones?

France has the most (12 timezones) due to overseas territories. Russia spans 11 timezones. The US has 6 (including Hawaii and Alaska).

WIB to ART

-10h

WIB

WIBSOURCE

UTC+07:00

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

ART

UTC-03:00

HH02

MM00

02:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

WIB

ART

12:00 AM

2:00 PM-1

2:00 AM

4:00 PM-1

4:00 AM

6:00 PM-1

6:00 AM

8:00 PM-1

8:00 AM

10:00 PM-1

10:00 AM

12:00 AM

12:00 PM

2:00 AM

2:00 PM

4:00 AM

4:00 PM

6:00 AM

6:00 PM

8:00 AM

8:00 PM

10:00 AM

10:00 PM

12:00 PM

Green rows indicate typical business hours (9 AM - 5 PM)

WIB and ART on the World Map

The map below highlights the WIB (Western Indonesia Time) and ART (Argentina Time) timezone regions across the globe.

WIB Zone

→

ART Zone

Explore all world timezones interactively →

WIB – Western Indonesia Time

UTC+07:00

Western Indonesia Time (WIB, UTC+07:00) covers Java, Sumatra and West Kalimantan, including Jakarta.

Countries in WIB

Indonesia (Java, Sumatra, West Kalimantan)

Major Cities in WIB

JakartaSurabayaBandungMedanPalembang

Key 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.
•Jakarta is the largest city in Southeast Asia by population.
•WIB shares the UTC+07:00 offset with Indochina Time.

Daylight Saving:No – UTC+07:00 year-round

Learn more about WIB on Wikipedia

ART – Argentina Time

UTC-03:00

Argentina Time (ART) is the standard time for Argentina, 3 hours behind UTC.

Countries in ART

Argentina

Major Cities in ART

Buenos AiresCórdobaRosarioMendozaLa PlataTucumán

Key Facts about ART

•Argentina does not observe daylight saving time.
•Buenos Aires is one of the most visited cities in South America.
•ART is the same offset as BRT (UTC-03:00).

Daylight Saving:No – UTC-03:00 year-round

Learn more about ART on Wikipedia

Comparing Time Zones: WIB and ART

WIB runs on Western Indonesia Time (WIB) at UTC+07:00. ART runs on Argentina Time (ART) at UTC-03:00. That puts WIB 10 hours behind ART — a difference of -10h at the current offsets.

In practice, when it is 9:00 AM in WIB it is 11:00 PM in ART on the previous day. Midnight in WIB is 2:00 PM in ART. Neither zone observes daylight saving time, so the offset between them stays constant all year.

WIB to ART time conversion table

WIB (WIB)	ART (ART)	Day
12:00 AM	2:00 PM	previous day
6:00 AM	8:00 PM	previous day
7:00 AM	9:00 PM	previous day
8:00 AM	10:00 PM	previous day
9:00 AM	11:00 PM	previous day
12:00 PM	2:00 AM	same day
3:00 PM	5:00 AM	same day
5:00 PM	7:00 AM	same day
6:00 PM	8:00 AM	same day
9:00 PM	11:00 AM	same day

Why people convert WIB to ART time

Scheduling a call from WIB to ART: a 10:00 AM start in WIB lands at 12:00 AM in ART, so you can confirm the slot without doing the arithmetic yourself.
Handling a -10h gap: WIB and ART 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 ART is 11:00 PM in WIB.
Booking travel or deliveries: tracking ART local time against WIB keeps pickup windows and arrival estimates honest across the -10h offset.

Always state the zone abbreviation, not just the hour. "3:00 PM WIB" is unambiguous; "3 PM" across a -10h gap is not.
With a -10h gap there is no shared 9-to-5 window, so alternate the early start: one week WIB takes the early slot, the next week ART does.

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 ART (Argentina Time)

Argentina Time (ART) is the time zone used throughout Argentina. Argentina does not observe daylight saving time. ART shares the same offset as Brasilia Time (BRT) and Uruguay's UYT.

Best time to call between WIB and ART

With a -10h offset there is no overlap inside a normal 9 AM – 5 PM day. ART opens at 9:00 AM ART, which is 11:00 PM in WIB, so real-time calls need an early-morning or late-evening slot on one side.

Business hours overlap

WIB and ART have no shared working hours because of the -10h gap. Teams need to alternate early starts or rely on asynchronous handovers.

WIB is 10 hours behind ART (WIB UTC+07:00 → ART UTC-03:00). There is no shared 9-to-5 window, so plan around an early or late slot. Remember to re-check around daylight-saving transitions.

Learn More About Time

Dive deeper into the fascinating world of timekeeping, time zones, and how they shape our global society:

⏳

History of Timekeeping

From sundials to atomic clocks - 5000 years of measuring time

🌍

How Time Zones Work

UTC, offsets, and why zones don't follow straight lines

☀️

Daylight Saving Time

DST dates, which countries observe it, and the ongoing debate

Frequently Asked Questions

What is the time difference between WIB and ART?

WIB (WIB, UTC+07:00) is 10 hours behind ART (ART, UTC-03:00). The gap is currently -10h.

How do I convert WIB time to ART time?

Add -10h to WIB local time. For example, 9:00 AM in WIB is 11:00 PM in ART (previous day).

What time is it in ART right now?

ART uses ART at UTC-03:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -10h offset from WIB.