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).

Singapore to Chicago

-13h

Singapore

SGTSOURCE

Singapore · UTC+08:00

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Chicago

CDT

USA · UTC-05:00☀ DST active

HH11

MM00

(previous day)23:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

Singapore

Chicago

12:00 AM

11:00 AM-1

2:00 AM

1:00 PM-1

4:00 AM

3:00 PM-1

6:00 AM

5:00 PM-1

8:00 AM

7:00 PM-1

10:00 AM

9:00 PM-1

12:00 PM

11:00 PM-1

2:00 PM

1:00 AM

4:00 PM

3:00 AM

6:00 PM

5:00 AM

8:00 PM

7:00 AM

10:00 PM

9:00 AM

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

SGT and CDT on the World Map

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

SGT Zone

→

CDT Zone

Explore all world timezones interactively →

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

CST – Central Standard Time

UTC-06:00

Central Standard Time (CST) is the time zone for the central United States, Canada, and Mexico, 6 hours behind UTC.

Countries in CST

United States (Central)Canada (Manitoba, Saskatchewan)MexicoGuatemalaHondurasEl SalvadorCosta RicaNicaraguaBelize

Major Cities in CST

ChicagoHoustonDallasSan AntonioMexico CityAustinWinnipegMemphisMilwaukeeNashvilleKansas CityNew OrleansMinneapolisGuatemala City

Key Facts about CST

•CST covers 20 US states fully or partially.
•Chicago and Houston are the two largest cities in the Central Time Zone.
•Mexico City, one of the world's most populous cities, operates on CST.
•CST is 1 hour behind EST and 2 hours ahead of PST.

Daylight Saving:Yes – switches to CDT

Learn more about CST on Wikipedia

About Singapore

Wikipedia

Singapore Standard Time (SGT) is 8 hours ahead of GMT. As Asia's leading financial hub, Singapore bridges business hours between Europe and Australia.

Population:5.5 million

Metro:5.9 million

Business Hours:9:00 AM - 6:00 PM SGT

Currency:SGD (S$)

Stock Exchange:SGX (Singapore Exchange)

Key Landmarks

Marina Bay SandsGardens by the BayMerlionSentosa IslandOrchard Road

Did You Know?

The city-state has the world's highest percentage of millionaires, with 1 in 6 households.

Learn more about SGT timezone →

About Chicago

Wikipedia

Chicago operates on Central Time (CST/CDT), 1 hour behind New York. Home to CME and CBOE, Chicago is a global center for derivatives trading.

Population:2.7 million

Metro:9.5 million

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

Currency:USD ($)

Stock Exchange:CME (Chicago Mercantile Exchange), CBOE

Key Landmarks

Willis TowerMillennium ParkCloud Gate (The Bean)Navy PierArt Institute of Chicago

Did You Know?

The Chicago Board of Trade is the world's oldest futures and options exchange.

Learn more about CDT timezone →

Understanding the -13h Gap: Singapore vs Chicago

Singapore runs on Singapore Standard Time (SGT) at UTC+08:00. Chicago runs on Central Daylight Time (CDT) at UTC-05:00, also currently on daylight saving time. That puts Singapore 13 hours behind Chicago — a difference of -13h at the current offsets.

In practice, when it is 9:00 AM in Singapore it is 8:00 PM in Chicago on the previous day. Midnight in Singapore is 11:00 AM in Chicago.Chicago observes daylight saving time while Singapore does not, so the gap narrows or widens by an hour part of the year.

Singapore to Chicago time conversion table

Singapore (SGT)	Chicago (CDT)	Day
12:00 AM	11:00 AM	previous day
6:00 AM	5:00 PM	previous day
7:00 AM	6:00 PM	previous day
8:00 AM	7:00 PM	previous day
9:00 AM	8:00 PM	previous day
12:00 PM	11:00 PM	previous day
3:00 PM	2:00 AM	same day
5:00 PM	4:00 AM	same day
6:00 PM	5:00 AM	same day
9:00 PM	8:00 AM	same day

Why people convert Singapore to Chicago time

Scheduling a call from Singapore to Chicago: a 10:00 AM start in Singapore lands at 9:00 PM in Chicago the previous day, so you can confirm the slot without doing the arithmetic yourself.
Handling a -13h gap: Singapore and Chicago 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 Chicago is 8:00 PM in Singapore.
Keeping family and friends in sync: knowing that 8:00 PM in Singapore is 7:00 AM in Chicago makes it easy to avoid calling at 3 AM.

Always state the zone abbreviation, not just the hour. "3:00 PM SGT" 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 Singapore takes the early slot, the next week Chicago does.
Chicago: Clocks fall back on Sun, Nov 1, 2026. Any meeting series spanning that date will shift by an hour in local time.

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.

About CST (Central Standard Time)

Central Standard Time (CST) covers the central region of North America. It is the second most populous time zone in the US, including major cities like Chicago, Houston, and Dallas. CST is also used in Mexico City and much of Central America including Guatemala, Honduras, El Salvador, and Costa Rica. During summer, most of the US and Canada switch to Central Daylight Time (CDT, UTC-05:00), while Mexico and Central American countries generally remain on CST.

Best time to call between Singapore and Chicago

With a -13h offset there is no overlap inside a normal 9 AM – 5 PM day. Chicago opens at 9:00 AM CDT, which is 8:00 PM in Singapore, so real-time calls need an early-morning or late-evening slot on one side.

Business hours overlap

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

Singapore is 13 hours behind Chicago (SGT UTC+08:00 → CDT UTC-05:00). There is no shared 9-to-5 window, so plan around an early or late slot. Remember to re-check around daylight-saving transitions.

🕐 Daylight Saving Time Info

Singapore

Does not observe DST

Chicago

☀ Currently in DST

Standard: UTC-06:00 · DST: UTC-05:00

Clocks fall back on Sun, Nov 1, 2026

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 Singapore and Chicago?

Singapore (SGT, UTC+08:00) is 13 hours behind Chicago (CDT, UTC-05:00). The gap is currently -13h.

How do I convert Singapore time to Chicago time?

Add -13h to Singapore local time. For example, 9:00 AM in Singapore is 8:00 PM in Chicago (previous day).

What time is it in Chicago right now?

Chicago uses CDT at UTC-05:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -13h offset from Singapore.

What is the best time to call Chicago from Singapore?

There is no shared working-hours window because of the -13h gap. The closest option is 1:00 PM in Singapore, which is 12:00 AM in Chicago.

Which is behind, Singapore or Chicago?

Singapore is 13 hours behind Chicago. When it is 12:00 PM in Singapore it is 11:00 PM in Chicago.

Do Singapore and Chicago use different time zones?

Singapore (Singapore) uses SGT at UTC+08:00, while Chicago (USA) uses CDT at UTC-05:00. The IANA identifiers are Asia/Singapore and America/Chicago.

Does daylight saving time affect the Singapore–Chicago difference?

Yes at the moment: Chicago is on daylight saving time and Singapore is not, so the -13h gap shifts by an hour when exactly one of them changes clocks.

Which other cities share Singapore's time zone?

SGT also covers Singapore.

Which countries use SGT, Singapore's zone?

SGT is used in Singapore.

Is there a day difference between Singapore and Chicago?

Sometimes. The -13h gap is large enough that 8:00 PM or later in Singapore already falls on the in Chicago.

What is the time difference between Singapore and Chicago?

Chicago is -13h from Singapore.

What timezone is Singapore in?

Singapore Standard Time (SGT) is 8 hours ahead of GMT. As Asia's leading financial hub, Singapore bridges business hours between Europe and Australia.

What timezone is Chicago in?

Chicago operates on Central Time (CST/CDT), 1 hour behind New York. Home to CME and CBOE, Chicago is a global center for derivatives trading.

What are the business hours in Singapore?

Standard business hours in Singapore are 9:00 AM - 6:00 PM SGT.

What are the business hours in Chicago?

Standard business hours in Chicago are 8:00 AM - 5:00 PM CST.

What is the best time to schedule a call between Singapore and Chicago?

The best overlap for a call is when both cities are in business hours. Singapore works 9:00 AM - 6:00 PM SGT and Chicago works 8:00 AM - 5:00 PM CST (-13h difference). Try scheduling during the overlapping window for maximum convenience.

What currencies are used in Singapore and Chicago?

Singapore uses SGD (S$) while Chicago uses USD ($). Check current exchange rates when planning travel or business between these cities.

How do Singapore and Chicago compare in size?

Singapore has a population of approximately 5.5 million (metro: 5.9 million), while Chicago has approximately 2.7 million (metro: 9.5 million).

What are the major landmarks in Singapore and Chicago?

Singapore is known for Marina Bay Sands, Gardens by the Bay, Merlion. Chicago is famous for Willis Tower, Millennium Park, Cloud Gate (The Bean).

Do Singapore and Chicago have stock exchanges?

Yes. Singapore has the SGX (Singapore Exchange) and Chicago has the CME (Chicago Mercantile Exchange), CBOE. The -13h time difference affects trading hour overlaps between these exchanges.