Colombo to Casablanca
-4h 30mColombo
ISTSOURCECasablanca
UTC+01:00Green rows indicate typical business hours (9 AM - 5 PM)
IST and UTC+01:00 on the World Map
The map below highlights the IST (India Standard Time) and UTC+01:00 (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.
Understanding the -4h 30m Gap: Colombo vs Casablanca
Colombo runs on India Standard Time (IST) at UTC+05:30. Casablanca runs on Western European Time (UTC+01:00) at UTC+01:00. That puts Colombo 4 hours 30 minutes behind Casablanca — 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 Casablanca. Midnight in Colombo is 7:30 PM in Casablanca. Neither zone observes daylight saving time, so the offset between them stays constant all year.
Colombo to Casablanca time conversion table
| Colombo (IST) | Casablanca (UTC+01:00) | 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 Casablanca time
- Scheduling a call from Colombo to Casablanca: a 10:00 AM start in Colombo lands at 5:30 AM in Casablanca, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both Colombo and Casablanca are inside the 9-to-5 working day between 1:30 PM and 5:00 PM IST time (9:00 AM–12:30 PM UTC+01:00). That is roughly 3 hours 30 minutes of usable overlap.
- Keeping family and friends in sync: knowing that 8:00 PM in Colombo is 3:30 PM in Casablanca makes it easy to avoid calling at 3 AM.
- 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 Casablanca colleagues present.
- Casablanca: Clocks fall back on Sun, Feb 7, 2027. 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 Casablanca
Both Colombo and Casablanca 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 UTC+01:00. 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 Casablanca 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 Casablanca (IST UTC+05:30 → UTC+01:00 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
Casablanca
❄ Currently in Standard Time
Standard: UTC+01:00 · DST: UTC+00:00
Clocks fall back on Sun, Feb 7, 2027
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 Casablanca?
Colombo (IST, UTC+05:30) is 4 hours 30 minutes behind Casablanca (UTC+01:00, UTC+01:00). The gap is currently -4h 30m.
How do I convert Colombo time to Casablanca time?
Add -4h 30m to Colombo local time. For example, 9:00 AM in Colombo is 4:30 AM in Casablanca.
What time is it in Casablanca right now?
Casablanca uses UTC+01:00 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 Casablanca from Colombo?
Call between 1:30 PM and 5:00 PM IST — that maps to 9:00 AM–12:30 PM UTC+01:00 and keeps both parties inside the working day.
Which is behind, Colombo or Casablanca?
Colombo is 4 hours 30 minutes behind Casablanca. When it is 12:00 PM in Colombo it is 7:30 AM in Casablanca.
Do Colombo and Casablanca use different time zones?
Colombo (Sri Lanka) uses IST at UTC+05:30, while Casablanca (Morocco) uses UTC+01:00 at UTC+01:00. The IANA identifiers are Asia/Colombo and Africa/Casablanca.
Does daylight saving time affect the Colombo–Casablanca difference?
Neither zone observes daylight saving time, so the -4h 30m offset between Colombo and Casablanca 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 Casablanca?
Not normally. The -4h 30m gap only pushes the date over the previous day.
What is the time difference between Colombo and Casablanca?
Casablanca 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 Casablanca in?
Casablanca 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 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 Casablanca?
When it is 12:00 AM (midnight) in Colombo (IST), it is -4h 30m later in Casablanca (WET).
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