SGT to Chicago
-13hSGT
SGTSOURCEChicago
CDTGreen 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 – Singapore Standard Time
UTC+08:00Singapore Standard Time (SGT) is the time zone for Singapore, 8 hours ahead of UTC.
- •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.
CST – Central Standard Time
UTC-06:00Central Standard Time (CST) is the time zone for the central United States, Canada, and Mexico, 6 hours behind UTC.
- •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.
About Chicago
WikipediaChicago operates on Central Time (CST/CDT), 1 hour behind New York. Home to CME and CBOE, Chicago is a global center for derivatives trading.
The Chicago Board of Trade is the world's oldest futures and options exchange.
Understanding the -13h Gap: SGT vs Chicago
SGT 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 SGT 13 hours behind Chicago — a difference of -13h at the current offsets.
In practice, when it is 9:00 AM in SGT it is 8:00 PM in Chicago on the previous day. Midnight in SGT is 11:00 AM in Chicago.Chicago observes daylight saving time while SGT does not, so the gap narrows or widens by an hour part of the year.
SGT to Chicago time conversion table
| SGT (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 SGT to Chicago time
- Scheduling a call from SGT to Chicago: a 10:00 AM start in SGT 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: SGT 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 SGT.
- Keeping family and friends in sync: knowing that 8:00 PM in SGT 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 SGT 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 SGT 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 SGT, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
SGT and Chicago have no shared working hours because of the -13h gap. Teams need to alternate early starts or rely on asynchronous handovers.
SGT 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
SGT
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:
Frequently Asked Questions
What is the time difference between SGT and Chicago?
SGT (SGT, UTC+08:00) is 13 hours behind Chicago (CDT, UTC-05:00). The gap is currently -13h.
How do I convert SGT time to Chicago time?
Add -13h to SGT local time. For example, 9:00 AM in SGT 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 SGT.
What is the best time to call Chicago from SGT?
There is no shared working-hours window because of the -13h gap. The closest option is 1:00 PM in SGT, which is 12:00 AM in Chicago.
Which is behind, SGT or Chicago?
SGT is 13 hours behind Chicago. When it is 12:00 PM in SGT it is 11:00 PM in Chicago.
Do SGT and Chicago use different time zones?
SGT 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 SGT–Chicago difference?
Yes at the moment: Chicago is on daylight saving time and SGT is not, so the -13h gap shifts by an hour when exactly one of them changes clocks.
Which other cities share SGT's time zone?
SGT also covers Singapore.
Which countries use SGT, SGT's zone?
SGT is used in Singapore.
Is there a day difference between SGT and Chicago?
Sometimes. The -13h gap is large enough that 8:00 PM or later in SGT already falls on the in Chicago.
What is the time difference between SGT and Chicago?
Chicago is -13h from SGT.
What timezone is SGT in?
SGT operates on its local timezone.
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 Chicago?
Standard business hours in Chicago are 8:00 AM - 5:00 PM CST.
Which countries use SGT (Singapore Standard Time)?
SGT is used in Singapore.
Does SGT observe daylight saving time?
No, SGT does not observe daylight saving time and remains at UTC+08:00 year-round.
What are some interesting 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.
Which cities are in the CST timezone?
Major cities in the CST timezone include Chicago, Houston, Dallas, San Antonio, Mexico City, Austin, Winnipeg, Memphis.
What is the UTC offset for CST?
Central Standard Time (CST) is at UTC-06:00. During daylight saving time, it shifts to CDT.
What should I know about the CST timezone?
CST covers 20 US states fully or partially. Chicago and Houston are the two largest cities in the Central Time Zone.
When is it midnight in SGT, what time is it in Chicago?
When it is 12:00 AM (midnight) in SGT (SGT), it is -13h later in Chicago (CST).
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