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 Lagos

-4h 30m

Sri Lanka

ISTSOURCE

UTC+05:30

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Lagos

WAT

Nigeria · UTC+01:00

HH07

MM30

07:30 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

Sri Lanka

Lagos

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 WAT on the World Map

The map below highlights the IST (India Standard Time) and WAT (West Africa Time) timezone regions across the globe.

IST Zone

→

WAT 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

WAT – West Africa Time

UTC+01:00

West Africa Time (WAT) is the time zone for West and Central Africa, 1 hour ahead of UTC.

Countries in WAT

NigeriaCameroonChadCongoAngolaNigerGabonEquatorial Guinea

Major Cities in WAT

LagosAbujaDoualaYaoundéLuandaKinshasaBrazzaville

Key Facts about WAT

•Lagos, Nigeria is the most populous city in Africa.
•WAT is the same offset as CET (UTC+01:00).
•Nigeria does not observe daylight saving time.

Daylight Saving:No – UTC+01:00 year-round

Learn more about WAT on Wikipedia

About Lagos

Wikipedia

Lagos operates on West Africa Time (WAT), UTC+1. As Africa's largest city and Nigeria's economic hub, Lagos is the center of African fintech innovation.

Population:15.4 million

Metro:21.3 million

Business Hours:8:00 AM - 5:00 PM WAT

Currency:NGN (₦)

Stock Exchange:NGX (Nigerian Exchange)

Key Landmarks

Nike Art GalleryLekki Conservation CentreNational MuseumTarkwa Bay BeachFreedom Park

Did You Know?

Lagos is one of the fastest-growing cities in the world and Africa's largest city.

Learn more about WAT timezone →

Understanding the -4h 30m Gap: Sri Lanka vs Lagos

Sri Lanka runs on India Standard Time (IST) at UTC+05:30. Lagos runs on West Africa Time (WAT) at UTC+01:00. That puts Sri Lanka 4 hours 30 minutes behind Lagos — 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 Lagos. Midnight in Sri Lanka is 7:30 PM in Lagos. Neither zone observes daylight saving time, so the offset between them stays constant all year.

Sri Lanka to Lagos time conversion table

Sri Lanka (IST)	Lagos (WAT)	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 Lagos time

Scheduling a call from Sri Lanka to Lagos: a 10:00 AM start in Sri Lanka lands at 5:30 AM in Lagos, so you can confirm the slot without doing the arithmetic yourself.
Finding shared working hours: both Sri Lanka and Lagos are inside the 9-to-5 working day between 1:30 PM and 5:00 PM IST time (9:00 AM–12:30 PM WAT). That is roughly 3 hours 30 minutes of usable overlap.
Booking travel or deliveries: tracking Lagos local time against Sri Lanka 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 Sri Lanka and need Lagos 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 WAT (West Africa Time)

West Africa Time (WAT) is used across much of West and Central Africa, including Nigeria, the most populous country in Africa. WAT does not observe daylight saving time and shares the same offset as Central European Time (CET).

Best time to call between Sri Lanka and Lagos

Both Sri Lanka and Lagos 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 WAT. 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 Lagos 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 Lagos (IST UTC+05:30 → WAT UTC+01:00). The shared working window is 1:30 PM–5:00 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:

⏳

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 Lagos?

Sri Lanka (IST, UTC+05:30) is 4 hours 30 minutes behind Lagos (WAT, UTC+01:00). The gap is currently -4h 30m.

How do I convert Sri Lanka time to Lagos time?

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

What time is it in Lagos right now?

Lagos uses WAT 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 Lagos from Sri Lanka?

Call between 1:30 PM and 5:00 PM IST — that maps to 9:00 AM–12:30 PM WAT and keeps both parties inside the working day.

Which is behind, Sri Lanka or Lagos?

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

Do Sri Lanka and Lagos use different time zones?

Sri Lanka (Sri Lanka) uses IST at UTC+05:30, while Lagos (Nigeria) uses WAT at UTC+01:00. The IANA identifiers are Asia/Colombo and Africa/Lagos.

Does daylight saving time affect the Sri Lanka–Lagos difference?

Neither zone observes daylight saving time, so the -4h 30m offset between Sri Lanka and Lagos is fixed all year.

Which other cities share Sri Lanka's time zone?

IST also covers Mumbai, Delhi, Bangalore, Kolkata, Chennai, Hyderabad, Pune, Ahmedabad and 4 more.

Which countries use IST, Sri Lanka's zone?

IST is used in India, Sri Lanka.

Is there a day difference between Sri Lanka and Lagos?

Not normally. The -4h 30m gap only pushes the date over the previous day.

What is the time difference between Sri Lanka and Lagos?

Lagos is -4h 30m from Sri Lanka.

What timezone is Sri Lanka in?

Sri Lanka operates on its local timezone.

What timezone is Lagos in?

Lagos operates on West Africa Time (WAT), UTC+1. As Africa's largest city and Nigeria's economic hub, Lagos is the center of African fintech innovation.