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).

Chicago to Singapore

+13h

Chicago

CDTSOURCE

USA · UTC-05:00☀ DST active

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Singapore

SGT

Singapore · UTC+08:00

HH01

MM00

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

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

Chicago

Singapore

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)

CDT and SGT on the World Map

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

CDT Zone

→

SGT Zone

Explore all world timezones interactively →

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

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

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 →

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 →

Time Conversion Guide: Chicago to Singapore

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

In practice, when it is 9:00 AM in Chicago it is 10:00 PM in Singapore. Midnight in Chicago is 1:00 PM in Singapore.Chicago observes daylight saving time while Singapore does not, so the gap narrows or widens by an hour part of the year.

Chicago to Singapore time conversion table

Chicago (CDT)	Singapore (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 Chicago to Singapore time

Scheduling a call from Chicago to Singapore: a 10:00 AM start in Chicago lands at 11:00 PM in Singapore, so you can confirm the slot without doing the arithmetic yourself.
Handling a +13h gap: Chicago and Singapore 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 Singapore is 10:00 PM in Chicago.
Coordinating a Chicago-based team with Singapore 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 CDT" 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 Chicago takes the early slot, the next week Singapore does.
Chicago: Clocks fall back on Sun, Nov 1, 2026. Re-check this page after that date because the offset changes and so does the +13h gap.

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.

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 Chicago and Singapore

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

Business hours overlap

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

Chicago is 13 hours ahead of Singapore (CDT 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.

🕐 Daylight Saving Time Info

Chicago

☀ Currently in DST

Standard: UTC-06:00 · DST: UTC-05:00

Clocks fall back on Sun, Nov 1, 2026

Singapore

Does not observe DST

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 Chicago and Singapore?

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

How do I convert Chicago time to Singapore time?

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

What time is it in Singapore right now?

Singapore 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 Chicago.

What is the best time to call Singapore from Chicago?

There is no shared working-hours window because of the +13h gap. The closest option is 1:00 PM in Chicago, which is 2:00 AM in Singapore.

Which is ahead, Chicago or Singapore?

Chicago is 13 hours ahead of Singapore. When it is 12:00 PM in Chicago it is 1:00 AM in Singapore.

Do Chicago and Singapore use different time zones?

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

Does daylight saving time affect the Chicago–Singapore 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 Chicago's time zone?

CDT also covers Chicago, Houston, Dallas, San Antonio, Mexico City, Austin, Winnipeg, Memphis and 6 more.

Which countries use CDT, Chicago's zone?

CDT is used in United States (Central), Canada (Manitoba, Saskatchewan), Mexico, Guatemala, Honduras, El Salvador, Costa Rica, Nicaragua and 1 more.

Is there a day difference between Chicago and Singapore?

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

What is the time difference between Chicago and Singapore?

Singapore is +13h from Chicago.

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 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 are the business hours in Chicago?

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

What are the business hours in Singapore?

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

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

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

What currencies are used in Chicago and Singapore?

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

How do Chicago and Singapore compare in size?

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

What are the major landmarks in Chicago and Singapore?

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

Do Chicago and Singapore have stock exchanges?

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