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).

Jakarta to Colombo

-1h 30m

Jakarta

WIBSOURCE

Indonesia · UTC+07:00

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Colombo

IST

Sri Lanka · UTC+05:30

HH10

MM30

10:30 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

Jakarta

Colombo

12:00 AM

10:30 PM-1

2:00 AM

12:30 AM

4:00 AM

2:30 AM

6:00 AM

4:30 AM

8:00 AM

6:30 AM

10:00 AM

8:30 AM

12:00 PM

10:30 AM

2:00 PM

12:30 PM

4:00 PM

2:30 PM

6:00 PM

4:30 PM

8:00 PM

6:30 PM

10:00 PM

8:30 PM

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

WIB and IST on the World Map

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

WIB Zone

→

IST 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

IST – India Standard Time

UTC+05:30

India Standard Time (IST) is the time zone for India and Sri Lanka, 5 hours and 30 minutes ahead of UTC.

Countries in IST

IndiaSri Lanka

Major Cities in IST

MumbaiDelhiBangaloreKolkataChennaiHyderabadPuneAhmedabadColomboJaipurLucknowSurat

Key Facts about IST

•India is 10 hours 30 minutes ahead of EST and 5 hours 30 minutes ahead of GMT.
•India uses a single time zone despite spanning 30° of longitude.
•IST is one of only a handful of time zones with a 30-minute offset.
•IST is the most populous single time zone in the world with over 1.4 billion people.
•The Bombay Stock Exchange (BSE) and National Stock Exchange (NSE) operate on IST.

Daylight Saving:No – UTC+05:30 year-round

Learn more about IST on Wikipedia

About Jakarta

Wikipedia

Jakarta operates on Western Indonesia Time (WIB), UTC+7. As Southeast Asia's largest economy, Jakarta's IDX is a key emerging market exchange.

Population:10.5 million

Metro:34.5 million

Business Hours:8:00 AM - 5:00 PM WIB

Currency:IDR (Rp)

Stock Exchange:IDX (Indonesia Stock Exchange)

Key Landmarks

MonasIstiqlal MosqueOld Town (Kota Tua)Taman MiniAncol Dreamland

Did You Know?

Indonesia has 3 time zones; Jakarta uses Western Indonesia Time (WIB).

Learn more about WIB timezone →

About Colombo

Wikipedia

Colombo operates on Sri Lanka Time (SLST), UTC+5:30. Sharing India's timezone, Colombo is a key South Asian trade and tourism hub.

Population:752,000

Metro:5.6 million

Business Hours:9:00 AM - 5:00 PM IST

Currency:LKR (Rs)

Stock Exchange:CSE (Colombo Stock Exchange)

Key Landmarks

Galle Face GreenGangaramaya TempleColombo Lotus TowerIndependence SquareDutch Hospital

Did You Know?

Sri Lanka Standard Time (SLST) uses UTC+5:30, same offset as India.

Learn more about IST timezone →

Jakarta to Colombo Time Difference – Complete Guide

Jakarta runs on Western Indonesia Time (WIB) at UTC+07:00. Colombo runs on India Standard Time (IST) at UTC+05:30. That puts Jakarta 1 hour 30 minutes behind Colombo — a difference of -1h 30m at the current offsets.

In practice, when it is 9:00 AM in Jakarta it is 7:30 AM in Colombo. Midnight in Jakarta is 10:30 PM in Colombo. Neither zone observes daylight saving time, so the offset between them stays constant all year.

Jakarta to Colombo time conversion table

Jakarta (WIB)	Colombo (IST)	Day
12:00 AM	10:30 PM	previous day
6:00 AM	4:30 AM	same day
7:00 AM	5:30 AM	same day
8:00 AM	6:30 AM	same day
9:00 AM	7:30 AM	same day
12:00 PM	10:30 AM	same day
3:00 PM	1:30 PM	same day
5:00 PM	3:30 PM	same day
6:00 PM	4:30 PM	same day
9:00 PM	7:30 PM	same day

Why people convert Jakarta to Colombo time

Scheduling a call from Jakarta to Colombo: a 10:00 AM start in Jakarta lands at 8:30 AM in Colombo, so you can confirm the slot without doing the arithmetic yourself.
Finding shared working hours: both Jakarta and Colombo are inside the 9-to-5 working day between 10:30 AM and 5:00 PM WIB time (9:00 AM–3:30 PM IST). That is roughly 6 hours 30 minutes of usable overlap.
Coordinating a Jakarta-based team with Colombo 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 -1h 30m gap is not.
Block 10:30 AM–5:00 PM WIB as the recurring meeting window if you work primarily from Jakarta and need Colombo 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 IST (India Standard Time)

India Standard Time (IST) is the time observed throughout India and Sri Lanka. It is based on the 82.5°E meridian, passing through Mirzapur in Uttar Pradesh. India uses a single time zone despite spanning roughly 30° of longitude, which has been debated. IST does not observe daylight saving time. India is the world's most populous country, making IST one of the most-used time zones globally. The IT outsourcing industry and call centers operate primarily on IST, making the EST-to-IST conversion one of the most searched timezone conversions.

Best time to call between Jakarta and Colombo

Both Jakarta and Colombo sit inside the 9 AM – 5 PM working day between 10:30 AM–5:00 PM WIB, which is 9:00 AM–3:30 PM IST. That gives roughly 6 hours and 30 minutes of shared time — the safest window for a live call or meeting.

Business hours overlap

Jakarta and Colombo share 6 hours of working-hours overlap (10:30 AM–5:00 PM WIB), so scheduling a live meeting is straightforward.

Jakarta is 1 hour 30 minutes behind Colombo (WIB UTC+07:00 → IST UTC+05:30). The shared working window is 10:30 AM–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:

⏳

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 Jakarta and Colombo?

Jakarta (WIB, UTC+07:00) is 1 hour 30 minutes behind Colombo (IST, UTC+05:30). The gap is currently -1h 30m.

How do I convert Jakarta time to Colombo time?

Add -1h 30m to Jakarta local time. For example, 9:00 AM in Jakarta is 7:30 AM in Colombo.

What time is it in Colombo right now?

Colombo uses IST at UTC+05:30. Use the live converter at the top of this page — it updates in real time and already accounts for the -1h 30m offset from Jakarta.

What is the best time to call Colombo from Jakarta?

Call between 10:30 AM and 5:00 PM WIB — that maps to 9:00 AM–3:30 PM IST and keeps both parties inside the working day.

Which is behind, Jakarta or Colombo?

Jakarta is 1 hour 30 minutes behind Colombo. When it is 12:00 PM in Jakarta it is 10:30 AM in Colombo.

Do Jakarta and Colombo use different time zones?

Jakarta (Indonesia) uses WIB at UTC+07:00, while Colombo (Sri Lanka) uses IST at UTC+05:30. The IANA identifiers are Asia/Jakarta and Asia/Colombo.

Does daylight saving time affect the Jakarta–Colombo difference?

Neither zone observes daylight saving time, so the -1h 30m offset between Jakarta and Colombo is fixed all year.

Which other cities share Jakarta's time zone?

WIB also covers Jakarta, Surabaya, Bandung, Medan, Palembang.

Which countries use WIB, Jakarta's zone?

WIB is used in Indonesia (Java, Sumatra, West Kalimantan).

Is there a day difference between Jakarta and Colombo?

Not normally. The -1h 30m gap only pushes the date over the previous day.

What is the time difference between Jakarta and Colombo?

Colombo is -1h 30m from Jakarta.

What timezone is Jakarta in?

Jakarta operates on Western Indonesia Time (WIB), UTC+7. As Southeast Asia's largest economy, Jakarta's IDX is a key emerging market exchange.

What timezone is Colombo in?

Colombo operates on Sri Lanka Time (SLST), UTC+5:30. Sharing India's timezone, Colombo is a key South Asian trade and tourism hub.

What are the business hours in Jakarta?

Standard business hours in Jakarta are 8:00 AM - 5:00 PM WIB.

What are the business hours in Colombo?

Standard business hours in Colombo are 9:00 AM - 5:00 PM IST.

What is the best time to schedule a call between Jakarta and Colombo?

The best overlap for a call is when both cities are in business hours. Jakarta works 8:00 AM - 5:00 PM WIB and Colombo works 9:00 AM - 5:00 PM IST (-1h 30m difference). Try scheduling during the overlapping window for maximum convenience.

What currencies are used in Jakarta and Colombo?

Jakarta uses IDR (Rp) while Colombo uses LKR (Rs). Check current exchange rates when planning travel or business between these cities.

How do Jakarta and Colombo compare in size?

Jakarta has a population of approximately 10.5 million (metro: 34.5 million), while Colombo has approximately 752,000 (metro: 5.6 million).

What are the major landmarks in Jakarta and Colombo?

Jakarta is known for Monas, Istiqlal Mosque, Old Town (Kota Tua). Colombo is famous for Galle Face Green, Gangaramaya Temple, Colombo Lotus Tower.

Do Jakarta and Colombo have stock exchanges?

Yes. Jakarta has the IDX (Indonesia Stock Exchange) and Colombo has the CSE (Colombo Stock Exchange). The -1h 30m time difference affects trading hour overlaps between these exchanges.