Thailand to Chicago
-12hThailand
ICTSOURCEChicago
CDTGreen rows indicate typical business hours (9 AM - 5 PM)
ICT and CDT on the World Map
The map below highlights the ICT (Indochina Time) and CDT (Central Standard Time) timezone regions across the globe.
ICT – Indochina Time
UTC+07:00Indochina Time (ICT) is the time zone for Vietnam, Thailand, Laos, and Cambodia, 7 hours ahead of UTC.
- •Bangkok is one of the most visited cities in the world.
- •ICT is 12 hours ahead of EST.
- •Thailand, Vietnam, and Cambodia all share ICT.
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.
Everything You Need to Know About Thailand and Chicago Time
Thailand runs on Indochina Time (ICT) at UTC+07:00. Chicago runs on Central Daylight Time (CDT) at UTC-05:00, also currently on daylight saving time. That puts Thailand 12 hours behind Chicago — a difference of -12h at the current offsets.
In practice, when it is 9:00 AM in Thailand it is 9:00 PM in Chicago on the previous day. Midnight in Thailand is 12:00 PM in Chicago.Chicago observes daylight saving time while Thailand does not, so the gap narrows or widens by an hour part of the year.
Thailand to Chicago time conversion table
| Thailand (ICT) | Chicago (CDT) | Day |
|---|---|---|
| 12:00 AM | 12:00 PM | previous day |
| 6:00 AM | 6:00 PM | previous day |
| 7:00 AM | 7:00 PM | previous day |
| 8:00 AM | 8:00 PM | previous day |
| 9:00 AM | 9:00 PM | previous day |
| 12:00 PM | 12:00 AM | same day |
| 3:00 PM | 3:00 AM | same day |
| 5:00 PM | 5:00 AM | same day |
| 6:00 PM | 6:00 AM | same day |
| 9:00 PM | 9:00 AM | same day |
Why people convert Thailand to Chicago time
- Scheduling a call from Thailand to Chicago: a 10:00 AM start in Thailand lands at 10:00 PM in Chicago the previous day, so you can confirm the slot without doing the arithmetic yourself.
- Handling a -12h gap: Thailand 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 9:00 PM in Thailand.
- Coordinating a Thailand-based team with Chicago 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 ICT" is unambiguous; "3 PM" across a -12h gap is not.
- With a -12h gap there is no shared 9-to-5 window, so alternate the early start: one week Thailand 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 ICT (Indochina Time)
Indochina Time (ICT) is used across Southeast Asia including Vietnam, Thailand, Laos, and Cambodia. Indonesia (Western time, WIB) also uses UTC+07:00. ICT does not observe daylight saving time.
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 Thailand and Chicago
With a -12h offset there is no overlap inside a normal 9 AM – 5 PM day. Chicago opens at 9:00 AM CDT, which is 9:00 PM in Thailand, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
Thailand and Chicago have no shared working hours because of the -12h gap. Teams need to alternate early starts or rely on asynchronous handovers.
Thailand is 12 hours behind Chicago (ICT UTC+07:00 → 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
Thailand
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 Thailand and Chicago?
Thailand (ICT, UTC+07:00) is 12 hours behind Chicago (CDT, UTC-05:00). The gap is currently -12h.
How do I convert Thailand time to Chicago time?
Add -12h to Thailand local time. For example, 9:00 AM in Thailand is 9:00 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 -12h offset from Thailand.
What is the best time to call Chicago from Thailand?
There is no shared working-hours window because of the -12h gap. The closest option is 1:00 PM in Thailand, which is 1:00 AM in Chicago.
Which is behind, Thailand or Chicago?
Thailand is 12 hours behind Chicago. When it is 12:00 PM in Thailand it is 12:00 AM in Chicago.
Do Thailand and Chicago use different time zones?
Thailand (Thailand) uses ICT at UTC+07:00, while Chicago (USA) uses CDT at UTC-05:00. The IANA identifiers are Asia/Bangkok and America/Chicago.
Does daylight saving time affect the Thailand–Chicago difference?
Yes at the moment: Chicago is on daylight saving time and Thailand is not, so the -12h gap shifts by an hour when exactly one of them changes clocks.
Which other cities share Thailand's time zone?
ICT also covers Bangkok, Ho Chi Minh City, Hanoi, Jakarta, Phnom Penh, Vientiane.
Which countries use ICT, Thailand's zone?
ICT is used in Thailand, Vietnam, Cambodia, Laos, Indonesia (WIB).
Is there a day difference between Thailand and Chicago?
Sometimes. The -12h gap is large enough that 8:00 PM or later in Thailand already falls on the in Chicago.
What is the time difference between Thailand and Chicago?
Chicago is -12h from Thailand.
What timezone is Thailand in?
Thailand 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 ICT (Indochina Time)?
ICT is used in Thailand, Vietnam, Cambodia, Laos, Indonesia (WIB).
Does ICT observe daylight saving time?
No, ICT does not observe daylight saving time and remains at UTC+07:00 year-round.
What are some interesting facts about ICT?
Bangkok is one of the most visited cities in the world. ICT is 12 hours ahead of EST.
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 Thailand, what time is it in Chicago?
When it is 12:00 AM (midnight) in Thailand (ICT), it is -12h later in Chicago (CST).
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