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).

COT to SGT

+13h

COT

COTSOURCE

UTC-05:00

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

SGT

UTC+08:00

HH01

MM00

(next day)01:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

COT

SGT

12:00 AM

1:00 PM

2:00 AM

3:00 PM

4:00 AM

5:00 PM

6:00 AM

7:00 PM

8:00 AM

9:00 PM

10:00 AM

11:00 PM

12:00 PM

1:00 AM+1

2:00 PM

3:00 AM+1

4:00 PM

5:00 AM+1

6:00 PM

7:00 AM+1

8:00 PM

9:00 AM+1

10:00 PM

11:00 AM+1

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

COT and SGT on the World Map

The map below highlights the COT (Colombia Time) and SGT (Singapore Standard Time) timezone regions across the globe.

COT Zone

→

SGT Zone

Explore all world timezones interactively →

COT – Colombia Time

UTC-05:00

Colombia Time (COT) is the standard time for Colombia, 5 hours behind UTC.

Countries in COT

Colombia

Major Cities in COT

BogotáMedellínCaliBarranquillaCartagena

Key Facts about COT

•Colombia does not observe daylight saving time.
•COT is the same offset as EST (UTC-05:00).
•Bogotá sits at 2,640m elevation, making it one of the highest capital cities.

Daylight Saving:No – UTC-05:00 year-round

Learn more about COT on Wikipedia

SGT – Singapore Standard Time

UTC+08:00

Singapore Standard Time (SGT) is the time zone for Singapore, 8 hours ahead of UTC.

Countries in SGT

Singapore

Major Cities in SGT

Singapore

Key Facts about SGT

•Singapore uses UTC+08:00 despite being at about 104°E longitude (closer to UTC+07:00).
•Singapore does not observe daylight saving time.
•The Singapore Exchange (SGX) operates on SGT.

Daylight Saving:No – UTC+08:00 year-round

Learn more about SGT on Wikipedia

COT vs SGT: Offsets, DST and Best Call Times

COT runs on Colombia Time (COT) at UTC-05:00. SGT runs on Singapore Standard Time (SGT) at UTC+08:00. That puts COT 13 hours ahead of SGT — a difference of +13h at the current offsets.

In practice, when it is 9:00 AM in COT it is 10:00 PM in SGT. Midnight in COT is 1:00 PM in SGT. Neither zone observes daylight saving time, so the offset between them stays constant all year.

COT to SGT time conversion table

COT (COT)	SGT (SGT)	Day
12:00 AM	1:00 PM	same day
6:00 AM	7:00 PM	same day
7:00 AM	8:00 PM	same day
8:00 AM	9:00 PM	same day
9:00 AM	10:00 PM	same day
12:00 PM	1:00 AM	next day
3:00 PM	4:00 AM	next day
5:00 PM	6:00 AM	next day
6:00 PM	7:00 AM	next day
9:00 PM	10:00 AM	next day

Why people convert COT to SGT time

Scheduling a call from COT to SGT: a 10:00 AM start in COT lands at 11:00 PM in SGT, so you can confirm the slot without doing the arithmetic yourself.
Handling a +13h gap: COT and SGT have no overlap inside a normal 9-to-5 day, so real-time meetings need an early-morning or late-evening slot on one side. 9:00 AM in SGT is 10:00 PM in COT.
Watching a live event or market open: COT viewers need 10:00 PM in SGT to catch a 9:00 AM start there, and 11:00 AM if the event is anchored to COT.

Always state the zone abbreviation, not just the hour. "3:00 PM COT" is unambiguous; "3 PM" across a +13h gap is not.
With a +13h gap there is no shared 9-to-5 window, so alternate the early start: one week COT takes the early slot, the next week SGT does.

About COT (Colombia Time)

Colombia Time (COT) is used throughout Colombia. Colombia does not observe daylight saving time. COT shares the same offset as EST (UTC-05:00). Bogotá, the capital, is one of the largest cities in South America.

About SGT (Singapore Standard Time)

Singapore Standard Time (SGT) is used in Singapore year-round. Singapore does not observe daylight saving time. Despite being geographically close to the UTC+07:00 zone, Singapore uses UTC+08:00 to align with major trading partners like China, Hong Kong, and Malaysia. Singapore is a major global financial hub.

Best time to call between COT and SGT

With a +13h offset there is no overlap inside a normal 9 AM – 5 PM day. SGT opens at 9:00 AM SGT, which is 10:00 PM in COT, so real-time calls need an early-morning or late-evening slot on one side.

Business hours overlap

COT and SGT have no shared working hours because of the +13h gap. Teams need to alternate early starts or rely on asynchronous handovers.

COT is 13 hours ahead of SGT (COT UTC-05:00 → SGT UTC+08:00). There is no shared 9-to-5 window, so plan around an early or late slot. 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 COT and SGT?

COT (COT, UTC-05:00) is 13 hours ahead of SGT (SGT, UTC+08:00). The gap is currently +13h.

How do I convert COT time to SGT time?

Add +13h to COT local time. For example, 9:00 AM in COT is 10:00 PM in SGT.

What time is it in SGT right now?

SGT uses SGT at UTC+08:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +13h offset from COT.