Does it handle Daylight Saving Time?

Yes, the tool automatically adjusts for Daylight Saving Time based on the specific date you select, ensuring accurate conversions year-round.

Can I add multiple cities?

Yes, you can add as many cities as you need to the dashboard to compare times across your entire global network simultaneously.

Indonesia to Sri Lanka

-1h 30m

Indonesia

WIBSOURCE

UTC+07:00

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Sri Lanka

IST

UTC+05:30

HH10

MM30

10:30 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

Indonesia

Sri Lanka

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

Indonesia vs Sri Lanka: Offsets, DST and Best Call Times

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

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

Indonesia to Sri Lanka time conversion table

Indonesia (WIB)	Sri Lanka (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 Indonesia to Sri Lanka time

Scheduling a call from Indonesia to Sri Lanka: a 10:00 AM start in Indonesia lands at 8:30 AM in Sri Lanka, so you can confirm the slot without doing the arithmetic yourself.
Finding shared working hours: both Indonesia and Sri Lanka 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.
Booking travel or deliveries: tracking Sri Lanka local time against Indonesia keeps pickup windows and arrival estimates honest across the -1h 30m offset.

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 Indonesia and need Sri Lanka 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 Indonesia and Sri Lanka

Both Indonesia and Sri Lanka 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

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

Indonesia is 1 hour 30 minutes behind Sri Lanka (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 Indonesia and Sri Lanka?

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

How do I convert Indonesia time to Sri Lanka time?

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

What time is it in Sri Lanka right now?

Sri Lanka 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 Indonesia.

What is the best time to call Sri Lanka from Indonesia?

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, Indonesia or Sri Lanka?

Indonesia is 1 hour 30 minutes behind Sri Lanka. When it is 12:00 PM in Indonesia it is 10:30 AM in Sri Lanka.

Do Indonesia and Sri Lanka use different time zones?

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