Colombo to WIB
+1h 30mColombo
ISTSOURCEWIB
WIBGreen rows indicate typical business hours (9 AM - 5 PM)
IST and WIB on the World Map
The map below highlights the IST (India Standard Time) and WIB (Western Indonesia Time) timezone regions across the globe.
IST – India Standard Time
UTC+05:30India Standard Time (IST) is the time zone for India and Sri Lanka, 5 hours and 30 minutes ahead of UTC.
- •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.
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.
About Colombo
WikipediaColombo operates on Sri Lanka Time (SLST), UTC+5:30. Sharing India's timezone, Colombo is a key South Asian trade and tourism hub.
Sri Lanka Standard Time (SLST) uses UTC+5:30, same offset as India.
Everything You Need to Know About Colombo and WIB Time
Colombo runs on India Standard Time (IST) at UTC+05:30. WIB runs on Western Indonesia Time (WIB) at UTC+07:00. That puts Colombo 1 hour 30 minutes ahead of WIB — a difference of +1h 30m at the current offsets.
In practice, when it is 9:00 AM in Colombo it is 10:30 AM in WIB. Midnight in Colombo is 1:30 AM in WIB. Neither zone observes daylight saving time, so the offset between them stays constant all year.
Colombo to WIB time conversion table
| Colombo (IST) | WIB (WIB) | Day |
|---|---|---|
| 12:00 AM | 1:30 AM | same day |
| 6:00 AM | 7:30 AM | same day |
| 7:00 AM | 8:30 AM | same day |
| 8:00 AM | 9:30 AM | same day |
| 9:00 AM | 10:30 AM | same day |
| 12:00 PM | 1:30 PM | same day |
| 3:00 PM | 4:30 PM | same day |
| 5:00 PM | 6:30 PM | same day |
| 6:00 PM | 7:30 PM | same day |
| 9:00 PM | 10:30 PM | same day |
Why people convert Colombo to WIB time
- Scheduling a call from Colombo to WIB: a 10:00 AM start in Colombo lands at 11:30 AM in WIB, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both Colombo and WIB are inside the 9-to-5 working day between 9:00 AM and 3:30 PM IST time (10:30 AM–5:00 PM WIB). That is roughly 6 hours 30 minutes of usable overlap.
- Booking travel or deliveries: tracking WIB local time against Colombo keeps pickup windows and arrival estimates honest across the +1h 30m offset.
- Always state the zone abbreviation, not just the hour. "3:00 PM IST" is unambiguous; "3 PM" across a +1h 30m gap is not.
- Block 9:00 AM–3:30 PM IST as the recurring meeting window if you work primarily from Colombo and need WIB colleagues present.
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.
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.
Best time to call between Colombo and WIB
Both Colombo and WIB sit inside the 9 AM – 5 PM working day between 9:00 AM–3:30 PM IST, which is 10:30 AM–5:00 PM WIB. That gives roughly 6 hours and 30 minutes of shared time — the safest window for a live call or meeting.
Business hours overlap
Colombo and WIB share 6 hours of working-hours overlap (9:00 AM–3:30 PM IST), so scheduling a live meeting is straightforward.
Colombo is 1 hour 30 minutes ahead of WIB (IST UTC+05:30 → WIB UTC+07:00). The shared working window is 9:00 AM–3:30 PM IST. 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 Colombo and WIB?
Colombo (IST, UTC+05:30) is 1 hour 30 minutes ahead of WIB (WIB, UTC+07:00). The gap is currently +1h 30m.
How do I convert Colombo time to WIB time?
Add +1h 30m to Colombo local time. For example, 9:00 AM in Colombo is 10:30 AM in WIB.
What time is it in WIB right now?
WIB uses WIB at UTC+07:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +1h 30m offset from Colombo.
What is the best time to call WIB from Colombo?
Call between 9:00 AM and 3:30 PM IST — that maps to 10:30 AM–5:00 PM WIB and keeps both parties inside the working day.
Which is ahead, Colombo or WIB?
Colombo is 1 hour 30 minutes ahead of WIB. When it is 12:00 PM in Colombo it is 1:30 PM in WIB.
Do Colombo and WIB use different time zones?
Colombo (Sri Lanka) uses IST at UTC+05:30, while WIB uses WIB at UTC+07:00. The IANA identifiers are Asia/Colombo and Asia/Jakarta.
Does daylight saving time affect the Colombo–WIB difference?
Neither zone observes daylight saving time, so the +1h 30m offset between Colombo and WIB is fixed all year.
Which other cities share Colombo's time zone?
IST also covers Mumbai, Delhi, Bangalore, Kolkata, Chennai, Hyderabad, Pune, Ahmedabad and 4 more.
Which countries use IST, Colombo's zone?
IST is used in India, Sri Lanka.
Is there a day difference between Colombo and WIB?
Not normally. The +1h 30m gap only pushes the date over for late-evening times.
What is the time difference between Colombo and WIB?
WIB is +1h 30m from Colombo.
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 timezone is WIB in?
WIB operates on its local timezone.
What are the business hours in Colombo?
Standard business hours in Colombo are 9:00 AM - 5:00 PM IST.
Which countries use IST (India Standard Time)?
IST is used in India, Sri Lanka.
Does IST observe daylight saving time?
No, IST does not observe daylight saving time and remains at UTC+05:30 year-round.
What are some interesting 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.
Which cities are in the WIB timezone?
Major cities in the WIB timezone include Jakarta, Surabaya, Bandung, Medan, Palembang.
What is the UTC offset for WIB?
Western Indonesia Time (WIB) is at UTC+07:00.
What should I know about the WIB timezone?
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.
When is it midnight in Colombo, what time is it in WIB?
When it is 12:00 AM (midnight) in Colombo (IST), it is +1h 30m later in WIB (WIB).
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