Chicago to SGT
+13hChicago
CDTSOURCESGT
SGTGreen 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.
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.
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.
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: Chicago vs SGT
Chicago runs on Central Daylight Time (CDT) at UTC-05:00, currently observing daylight saving time. SGT runs on Singapore Standard Time (SGT) at UTC+08:00. That puts Chicago 13 hours ahead of SGT — a difference of +13h at the current offsets.
In practice, when it is 9:00 AM in Chicago it is 10:00 PM in SGT. Midnight in Chicago is 1:00 PM in SGT.Chicago observes daylight saving time while SGT does not, so the gap narrows or widens by an hour part of the year.
Chicago to SGT time conversion table
| Chicago (CDT) | 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 Chicago to SGT time
- Scheduling a call from Chicago to SGT: a 10:00 AM start in Chicago lands at 11:00 PM in SGT, so you can confirm the slot without doing the arithmetic yourself.
- Handling a +13h gap: Chicago 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 Chicago.
- Coordinating a Chicago-based team with SGT 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 SGT 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 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 Chicago, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
Chicago and SGT 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 SGT (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
SGT
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:
Frequently Asked Questions
What is the time difference between Chicago and SGT?
Chicago (CDT, UTC-05:00) is 13 hours ahead of SGT (SGT, UTC+08:00). The gap is currently +13h.
How do I convert Chicago time to SGT time?
Add +13h to Chicago local time. For example, 9:00 AM in Chicago 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 Chicago.
What is the best time to call SGT 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 SGT.
Which is ahead, Chicago or SGT?
Chicago is 13 hours ahead of SGT. When it is 12:00 PM in Chicago it is 1:00 AM in SGT.
Do Chicago and SGT use different time zones?
Chicago (USA) uses CDT at UTC-05:00, while SGT uses SGT at UTC+08:00. The IANA identifiers are America/Chicago and Asia/Singapore.
Does daylight saving time affect the Chicago–SGT 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 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 SGT?
Sometimes. The +13h gap is large enough that 8:00 PM or later in Chicago already falls on the next day in SGT.
What is the time difference between Chicago and SGT?
SGT 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 SGT in?
SGT operates on its local timezone.
What are the business hours in Chicago?
Standard business hours in Chicago are 8:00 AM - 5:00 PM CST.
Which countries use CST (Central Standard Time)?
CST is used in United States (Central), Canada (Manitoba, Saskatchewan), Mexico, Guatemala, Honduras, El Salvador, and 3 more countries.
Does CST observe daylight saving time?
Yes, CST switches to CDT during summer months.
What are some interesting facts about CST?
CST covers 20 US states fully or partially. Chicago and Houston are the two largest cities in the Central Time Zone.
Which cities are in the SGT timezone?
Major cities in the SGT timezone include Singapore.
What is the UTC offset for SGT?
Singapore Standard Time (SGT) is at UTC+08:00.
What should I know about the SGT timezone?
Singapore uses UTC+08:00 despite being at about 104°E longitude (closer to UTC+07:00). Singapore does not observe daylight saving time.
When is it midnight in Chicago, what time is it in SGT?
When it is 12:00 AM (midnight) in Chicago (CST), it is +13h later in SGT (SGT).
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