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 HST

-17h

WIB

WIBSOURCE

UTC+07:00

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

HST

UTC-10:00

HH07

MM00

(previous day)19:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

WIB

HST

12:00 AM

7:00 AM-1

2:00 AM

9:00 AM-1

4:00 AM

11:00 AM-1

6:00 AM

1:00 PM-1

8:00 AM

3:00 PM-1

10:00 AM

5:00 PM-1

12:00 PM

7:00 PM-1

2:00 PM

9:00 PM-1

4:00 PM

11:00 PM-1

6:00 PM

1:00 AM

8:00 PM

3:00 AM

10:00 PM

5:00 AM

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

WIB and HST on the World Map

The map below highlights the WIB (Western Indonesia Time) and HST (Hawaii Standard Time) timezone regions across the globe.

WIB Zone

→

HST 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

HST – Hawaii Standard Time

UTC-10:00

Hawaii Standard Time (HST) is the time zone for the Hawaiian Islands, 10 hours behind UTC.

Countries in HST

United States (Hawaii)

Major Cities in HST

HonoluluHiloKailuaPearl CityKapolei

Key Facts about HST

•Hawaii does not observe daylight saving time.
•HST is 5 hours behind EST in winter and 6 hours behind EDT in summer.
•Hawaii is one of only two US states that don't observe DST (the other is Arizona).

Daylight Saving:No – UTC-10:00 year-round

Learn more about HST on Wikipedia

Comparing Time Zones: WIB and HST

WIB runs on Western Indonesia Time (WIB) at UTC+07:00. HST runs on Hawaii Standard Time (HST) at UTC-10:00. That puts WIB 17 hours behind HST — a difference of -17h at the current offsets.

In practice, when it is 9:00 AM in WIB it is 4:00 PM in HST on the previous day. Midnight in WIB is 7:00 AM in HST. Neither zone observes daylight saving time, so the offset between them stays constant all year.

WIB to HST time conversion table

WIB (WIB)	HST (HST)	Day
12:00 AM	7:00 AM	previous day
6:00 AM	1:00 PM	previous day
7:00 AM	2:00 PM	previous day
8:00 AM	3:00 PM	previous day
9:00 AM	4:00 PM	previous day
12:00 PM	7:00 PM	previous day
3:00 PM	10:00 PM	previous day
5:00 PM	12:00 AM	same day
6:00 PM	1:00 AM	same day
9:00 PM	4:00 AM	same day

Why people convert WIB to HST time

Scheduling a call from WIB to HST: a 10:00 AM start in WIB lands at 5:00 PM in HST the previous day, so you can confirm the slot without doing the arithmetic yourself.
Handling a -17h gap: WIB and HST 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 HST is 4:00 PM in WIB.
Coordinating a WIB-based team with HST contacts: quoting times in the other side's local clock — not your own — removes the single biggest source of missed meetings.

Always state the zone abbreviation, not just the hour. "3:00 PM WIB" is unambiguous; "3 PM" across a -17h gap is not.
With a -17h gap there is no shared 9-to-5 window, so alternate the early start: one week WIB takes the early slot, the next week HST 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 HST (Hawaii Standard Time)

Hawaii Standard Time (HST) is used in the state of Hawaii and does not observe daylight saving time. This makes HST one of the most consistent time zones in the US. The Hawaiian Islands are among the last places on Earth to see a new calendar day.

Best time to call between WIB and HST

With a -17h offset there is no overlap inside a normal 9 AM – 5 PM day. HST opens at 9:00 AM HST, which is 4:00 PM in WIB, so real-time calls need an early-morning or late-evening slot on one side.

Business hours overlap

WIB and HST have no shared working hours because of the -17h gap. Teams need to alternate early starts or rely on asynchronous handovers.

WIB is 17 hours behind HST (WIB UTC+07:00 → HST UTC-10:00). 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 HST?

WIB (WIB, UTC+07:00) is 17 hours behind HST (HST, UTC-10:00). The gap is currently -17h.

How do I convert WIB time to HST time?

Add -17h to WIB local time. For example, 9:00 AM in WIB is 4:00 PM in HST (previous day).

What time is it in HST right now?

HST uses HST at UTC-10:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -17h offset from WIB.