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).

Sri Lanka to Casablanca

-4h 30m

Sri Lanka

ISTSOURCE

UTC+05:30

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Casablanca

UTC+01:00

Morocco · UTC+01:00DST observed

HH07

MM30

07:30 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

Sri Lanka

Casablanca

12:00 AM

7:30 PM-1

2:00 AM

9:30 PM-1

4:00 AM

11:30 PM-1

6:00 AM

1:30 AM

8:00 AM

3:30 AM

10:00 AM

5:30 AM

12:00 PM

7:30 AM

2:00 PM

9:30 AM

4:00 PM

11:30 AM

6:00 PM

1:30 PM

8:00 PM

3:30 PM

10:00 PM

5:30 PM

Green 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 Zone

→

UTC+01:00 Zone

Explore all world timezones interactively →

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

WET – Western European Time

UTC+00:00

Western European Time (WET) is the time zone for Portugal, Morocco, and the Canary Islands, same as UTC+00:00.

Countries in WET

PortugalSpain (Canary Islands)MoroccoWestern Sahara

Major Cities in WET

LisbonPortoCasablancaLas PalmasFunchalRabat

Key Facts about WET

•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.

Daylight Saving:Yes – switches to WEST

Learn more about WET on Wikipedia

Comparing Time Zones: Sri Lanka and Casablanca

Sri Lanka 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 Sri Lanka 4 hours 30 minutes behind Casablanca — a difference of -4h 30m at the current offsets.

In practice, when it is 9:00 AM in Sri Lanka it is 4:30 AM in Casablanca. Midnight in Sri Lanka is 7:30 PM in Casablanca. Neither zone observes daylight saving time, so the offset between them stays constant all year.

Sri Lanka to Casablanca time conversion table

Sri Lanka (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 Sri Lanka to Casablanca time

Scheduling a call from Sri Lanka to Casablanca: a 10:00 AM start in Sri Lanka lands at 5:30 AM in Casablanca, so you can confirm the slot without doing the arithmetic yourself.
Finding shared working hours: both Sri Lanka 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.
Coordinating a Sri Lanka-based team with Casablanca 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 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 Sri Lanka 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 Sri Lanka and Casablanca

Both Sri Lanka 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

Sri Lanka and Casablanca overlap for about 3 hours during the working day — enough for meetings if you avoid the edges of the window.

Sri Lanka 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

Sri Lanka

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:

⏳

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 Sri Lanka and Casablanca?

Sri Lanka (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 Sri Lanka time to Casablanca time?

Add -4h 30m to Sri Lanka local time. For example, 9:00 AM in Sri Lanka 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 Sri Lanka.

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

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, Sri Lanka or Casablanca?

Sri Lanka is 4 hours 30 minutes behind Casablanca. When it is 12:00 PM in Sri Lanka it is 7:30 AM in Casablanca.

Do Sri Lanka and Casablanca use different time zones?

Sri Lanka (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.