Colombo to Lisbon
-4h 30mColombo
ISTSOURCELisbon
WESTGreen rows indicate typical business hours (9 AM - 5 PM)
IST and WEST on the World Map
The map below highlights the IST (India Standard Time) and WEST (Western European 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.
WET – Western European Time
UTC+00:00Western European Time (WET) is the time zone for Portugal, Morocco, and the Canary Islands, same as UTC+00:00.
- •Portugal is the only mainland European country in the WET time zone.
- •The Canary Islands are on WET despite being part of Spain (which uses CET).
- •WET is identical to GMT and UTC+00:00.
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.
About Lisbon
WikipediaLisbon operates on Western European Time (WET/WEST), same as London. As Portugal's capital and an emerging tech hub, Lisbon bridges European and Atlantic time zones.
Lisbon has 300 days of sunshine per year and is a major startup hub in Europe.
Time Conversion Guide: Colombo to Lisbon
Colombo runs on India Standard Time (IST) at UTC+05:30. Lisbon runs on Western European Summer Time (WEST) at UTC+01:00, also currently on daylight saving time. That puts Colombo 4 hours 30 minutes behind Lisbon — a difference of -4h 30m at the current offsets.
In practice, when it is 9:00 AM in Colombo it is 4:30 AM in Lisbon. Midnight in Colombo is 7:30 PM in Lisbon.Lisbon observes daylight saving time while Colombo does not, so the gap narrows or widens by an hour part of the year.
Colombo to Lisbon time conversion table
| Colombo (IST) | Lisbon (WEST) | Day |
|---|---|---|
| 12:00 AM | 7:30 PM | previous day |
| 6:00 AM | 1:30 AM | same day |
| 7:00 AM | 2:30 AM | same day |
| 8:00 AM | 3:30 AM | same day |
| 9:00 AM | 4:30 AM | same day |
| 12:00 PM | 7:30 AM | same day |
| 3:00 PM | 10:30 AM | same day |
| 5:00 PM | 12:30 PM | same day |
| 6:00 PM | 1:30 PM | same day |
| 9:00 PM | 4:30 PM | same day |
Why people convert Colombo to Lisbon time
- Scheduling a call from Colombo to Lisbon: a 10:00 AM start in Colombo lands at 5:30 AM in Lisbon, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both Colombo and Lisbon are inside the 9-to-5 working day between 1:30 PM and 5:00 PM IST time (9:00 AM–12:30 PM WEST). That is roughly 3 hours 30 minutes of usable overlap.
- Booking travel or deliveries: tracking Lisbon local time against Colombo keeps pickup windows and arrival estimates honest across the -4h 30m offset.
- Always state the zone abbreviation, not just the hour. "3:00 PM IST" is unambiguous; "3 PM" across a -4h 30m gap is not.
- Block 1:30 PM–5:00 PM IST as the recurring meeting window if you work primarily from Colombo and need Lisbon colleagues present.
- Lisbon: Clocks fall back on Sun, Oct 25, 2026. Any meeting series spanning that date will shift by an hour in local time.
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 WET (Western European Time)
Western European Time (WET) is used in Portugal, the Canary Islands (Spain), Morocco, and several other locations. It is equivalent to GMT/UTC. During summer, Portugal and the Canary Islands switch to WEST (Western European Summer Time, UTC+01:00).
Best time to call between Colombo and Lisbon
Both Colombo and Lisbon sit inside the 9 AM – 5 PM working day between 1:30 PM–5:00 PM IST, which is 9:00 AM–12:30 PM WEST. That gives roughly 3 hours and 30 minutes of shared time — the safest window for a live call or meeting.
Business hours overlap
Colombo and Lisbon overlap for about 3 hours during the working day — enough for meetings if you avoid the edges of the window.
Colombo is 4 hours 30 minutes behind Lisbon (IST UTC+05:30 → WEST UTC+01:00). The shared working window is 1:30 PM–5:00 PM IST. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
Colombo
Does not observe DST
Lisbon
☀ Currently in DST
Standard: UTC+00:00 · DST: UTC+01:00
Clocks fall back on Sun, Oct 25, 2026
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 Lisbon?
Colombo (IST, UTC+05:30) is 4 hours 30 minutes behind Lisbon (WEST, UTC+01:00). The gap is currently -4h 30m.
How do I convert Colombo time to Lisbon time?
Add -4h 30m to Colombo local time. For example, 9:00 AM in Colombo is 4:30 AM in Lisbon.
What time is it in Lisbon right now?
Lisbon uses WEST at UTC+01:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -4h 30m offset from Colombo.
What is the best time to call Lisbon from Colombo?
Call between 1:30 PM and 5:00 PM IST — that maps to 9:00 AM–12:30 PM WEST and keeps both parties inside the working day.
Which is behind, Colombo or Lisbon?
Colombo is 4 hours 30 minutes behind Lisbon. When it is 12:00 PM in Colombo it is 7:30 AM in Lisbon.
Do Colombo and Lisbon use different time zones?
Colombo (Sri Lanka) uses IST at UTC+05:30, while Lisbon (Portugal) uses WEST at UTC+01:00. The IANA identifiers are Asia/Colombo and Europe/Lisbon.
Does daylight saving time affect the Colombo–Lisbon difference?
Yes at the moment: Lisbon is on daylight saving time and Colombo is not, so the -4h 30m gap shifts by an hour when exactly one of them changes clocks.
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 Lisbon?
Not normally. The -4h 30m gap only pushes the date over the previous day.
What is the time difference between Colombo and Lisbon?
Lisbon is -4h 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 Lisbon in?
Lisbon operates on Western European Time (WET/WEST), same as London. As Portugal's capital and an emerging tech hub, Lisbon bridges European and Atlantic time zones.
What are the business hours in Colombo?
Standard business hours in Colombo are 9:00 AM - 5:00 PM IST.
What are the business hours in Lisbon?
Standard business hours in Lisbon are 9:00 AM - 6:00 PM WET.
What is the best time to schedule a call between Colombo and Lisbon?
The best overlap for a call is when both cities are in business hours. Colombo works 9:00 AM - 5:00 PM IST and Lisbon works 9:00 AM - 6:00 PM WET (-4h 30m difference). Try scheduling during the overlapping window for maximum convenience.
What currencies are used in Colombo and Lisbon?
Colombo uses LKR (Rs) while Lisbon uses EUR (€). Check current exchange rates when planning travel or business between these cities.
How do Colombo and Lisbon compare in size?
Colombo has a population of approximately 752,000 (metro: 5.6 million), while Lisbon has approximately 545,000 (metro: 2.9 million).
What are the major landmarks in Colombo and Lisbon?
Colombo is known for Galle Face Green, Gangaramaya Temple, Colombo Lotus Tower. Lisbon is famous for Belém Tower, Jerónimos Monastery, São Jorge Castle.
Do Colombo and Lisbon have stock exchanges?
Yes. Colombo has the CSE (Colombo Stock Exchange) and Lisbon has the Euronext Lisbon. The -4h 30m time difference affects trading hour overlaps between these exchanges.
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 WET timezone?
Major cities in the WET timezone include Lisbon, Porto, Casablanca, Las Palmas, Funchal, Rabat.
What is the UTC offset for WET?
Western European Time (WET) is at UTC+00:00. During daylight saving time, it shifts to WEST.
What should I know about the WET timezone?
Portugal is the only mainland European country in the WET time zone. The Canary Islands are on WET despite being part of Spain (which uses CET).
When is it midnight in Colombo, what time is it in Lisbon?
When it is 12:00 AM (midnight) in Colombo (IST), it is -4h 30m later in Lisbon (WET).
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