Does it handle Daylight Saving Time?

Yes, the tool automatically adjusts for Daylight Saving Time based on the specific date you select, ensuring accurate conversions year-round.

Can I add multiple cities?

Yes, you can add as many cities as you need to the dashboard to compare times across your entire global network simultaneously.

Sri Lanka to Riyadh

-2h 30m

Sri Lanka

ISTSOURCE

UTC+05:30

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Riyadh

AST

Saudi Arabia · UTC+03:00

HH09

MM30

09:30 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

Sri Lanka

Riyadh

12:00 AM

9:30 PM-1

2:00 AM

11:30 PM-1

4:00 AM

1:30 AM

6:00 AM

3:30 AM

8:00 AM

5:30 AM

10:00 AM

7:30 AM

12:00 PM

9:30 AM

2:00 PM

11:30 AM

4:00 PM

1:30 PM

6:00 PM

3:30 PM

8:00 PM

5:30 PM

10:00 PM

7:30 PM

Green rows indicate typical business hours (9 AM - 5 PM)

IST and AST on the World Map

The map below highlights the IST (India Standard Time) and AST (Arabia Standard Time) timezone regions across the globe.

IST Zone

→

AST 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

AST – Arabia Standard Time

UTC+03:00

Arabia Standard Time (AST, UTC+03:00) is the time zone for Saudi Arabia and the other Gulf states of the Arabian peninsula.

Countries in AST

Saudi ArabiaQatarKuwaitBahrainIraqYemen

Major Cities in AST

RiyadhJeddahDohaKuwait CityBaghdad

Key Facts about AST

•None of the Gulf states on Arabia Standard Time observe daylight saving.
•AST is the same offset as Moscow Standard Time and East Africa Time.
•Riyadh is one hour ahead of Central European Time in winter.
•The AST abbreviation is shared with Atlantic Standard Time (UTC-04:00).

Daylight Saving:No – UTC+03:00 year-round

Learn more about AST on Wikipedia

About Riyadh

Wikipedia

Riyadh operates on Arabia Standard Time (AST), UTC+3. As OPEC's de facto capital and home to Tadawul, Riyadh time impacts global energy markets.

Population:7.7 million

Metro:7.7 million

Business Hours:8:00 AM - 4:00 PM AST (Sunday-Thursday)

Currency:SAR (﷼)

Stock Exchange:Tadawul (Saudi Stock Exchange)

Key Landmarks

Kingdom CentreMasmak FortressNational MuseumAl Faisaliyah CenterDiriyah

Did You Know?

Riyadh is growing rapidly as part of Saudi Vision 2030 modernization.

Learn more about AST timezone →

Everything You Need to Know About Sri Lanka and Riyadh Time

Sri Lanka runs on India Standard Time (IST) at UTC+05:30. Riyadh runs on Arabian Standard Time (AST) at UTC+03:00. That puts Sri Lanka 2 hours 30 minutes behind Riyadh — a difference of -2h 30m at the current offsets.

In practice, when it is 9:00 AM in Sri Lanka it is 6:30 AM in Riyadh. Midnight in Sri Lanka is 9:30 PM in Riyadh. Neither zone observes daylight saving time, so the offset between them stays constant all year.

Sri Lanka to Riyadh time conversion table

Sri Lanka (IST)	Riyadh (AST)	Day
12:00 AM	9:30 PM	previous day
6:00 AM	3:30 AM	same day
7:00 AM	4:30 AM	same day
8:00 AM	5:30 AM	same day
9:00 AM	6:30 AM	same day
12:00 PM	9:30 AM	same day
3:00 PM	12:30 PM	same day
5:00 PM	2:30 PM	same day
6:00 PM	3:30 PM	same day
9:00 PM	6:30 PM	same day

Why people convert Sri Lanka to Riyadh time

Scheduling a call from Sri Lanka to Riyadh: a 10:00 AM start in Sri Lanka lands at 7:30 AM in Riyadh, so you can confirm the slot without doing the arithmetic yourself.
Finding shared working hours: both Sri Lanka and Riyadh are inside the 9-to-5 working day between 11:30 AM and 5:00 PM IST time (9:00 AM–2:30 PM AST). That is roughly 5 hours 30 minutes of usable overlap.
Booking travel or deliveries: tracking Riyadh local time against Sri Lanka keeps pickup windows and arrival estimates honest across the -2h 30m offset.

Always state the zone abbreviation, not just the hour. "3:00 PM IST" is unambiguous; "3 PM" across a -2h 30m gap is not.
Block 11:30 AM–5:00 PM IST as the recurring meeting window if you work primarily from Sri Lanka and need Riyadh 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 AST (Arabia Standard Time)

Arabia Standard Time (AST) is fixed at UTC+03:00 all year across Saudi Arabia, Qatar, Kuwait, Bahrain, Iraq and Yemen. None of these countries observes daylight saving time, so the offset never changes. The abbreviation collides with Atlantic Standard Time (UTC-04:00) used in eastern Canada and the Caribbean; this page covers the Arabian peninsula meaning. Arabia Standard Time is the same offset as Moscow Standard Time and East Africa Time, which makes scheduling with Europe straightforward — Riyadh is one hour ahead of Central European Time in winter and level with it during European summer time.

Best time to call between Sri Lanka and Riyadh

Both Sri Lanka and Riyadh sit inside the 9 AM – 5 PM working day between 11:30 AM–5:00 PM IST, which is 9:00 AM–2:30 PM AST. That gives roughly 5 hours and 30 minutes of shared time — the safest window for a live call or meeting.

Business hours overlap

Sri Lanka and Riyadh share 5 hours of working-hours overlap (11:30 AM–5:00 PM IST), so scheduling a live meeting is straightforward.

Sri Lanka is 2 hours 30 minutes behind Riyadh (IST UTC+05:30 → AST UTC+03:00). The shared working window is 11:30 AM–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 Riyadh?

Sri Lanka (IST, UTC+05:30) is 2 hours 30 minutes behind Riyadh (AST, UTC+03:00). The gap is currently -2h 30m.

How do I convert Sri Lanka time to Riyadh time?

Add -2h 30m to Sri Lanka local time. For example, 9:00 AM in Sri Lanka is 6:30 AM in Riyadh.

What time is it in Riyadh right now?

Riyadh uses AST at UTC+03:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -2h 30m offset from Sri Lanka.

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

Call between 11:30 AM and 5:00 PM IST — that maps to 9:00 AM–2:30 PM AST and keeps both parties inside the working day.

Which is behind, Sri Lanka or Riyadh?

Sri Lanka is 2 hours 30 minutes behind Riyadh. When it is 12:00 PM in Sri Lanka it is 9:30 AM in Riyadh.

Do Sri Lanka and Riyadh use different time zones?

Sri Lanka (Sri Lanka) uses IST at UTC+05:30, while Riyadh (Saudi Arabia) uses AST at UTC+03:00. The IANA identifiers are Asia/Colombo and Asia/Riyadh.