Chicago to GST
+9hChicago
CDTSOURCEGST
GSTGreen rows indicate typical business hours (9 AM - 5 PM)
CDT and GST on the World Map
The map below highlights the CDT (Central Standard Time) and GST (Gulf 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.
GST – Gulf Standard Time
UTC+04:00Gulf Standard Time (GST) is used in the UAE, Oman, and other Gulf states, 4 hours ahead of UTC.
- •Dubai uses GST year-round with no daylight saving time.
- •GST is 9 hours ahead of EST and 4 hours ahead of GMT.
- •The Dubai Financial Market (DFM) operates on GST.
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 +9h Gap: Chicago vs GST
Chicago runs on Central Daylight Time (CDT) at UTC-05:00, currently observing daylight saving time. GST runs on Gulf Standard Time (GST) at UTC+04:00. That puts Chicago 9 hours ahead of GST — a difference of +9h at the current offsets.
In practice, when it is 9:00 AM in Chicago it is 6:00 PM in GST. Midnight in Chicago is 9:00 AM in GST.Chicago observes daylight saving time while GST does not, so the gap narrows or widens by an hour part of the year.
Chicago to GST time conversion table
| Chicago (CDT) | GST (GST) | Day |
|---|---|---|
| 12:00 AM | 9:00 AM | same day |
| 6:00 AM | 3:00 PM | same day |
| 7:00 AM | 4:00 PM | same day |
| 8:00 AM | 5:00 PM | same day |
| 9:00 AM | 6:00 PM | same day |
| 12:00 PM | 9:00 PM | same day |
| 3:00 PM | 12:00 AM | next day |
| 5:00 PM | 2:00 AM | next day |
| 6:00 PM | 3:00 AM | next day |
| 9:00 PM | 6:00 AM | next day |
Why people convert Chicago to GST time
- Scheduling a call from Chicago to GST: a 10:00 AM start in Chicago lands at 7:00 PM in GST, so you can confirm the slot without doing the arithmetic yourself.
- Handling a +9h gap: Chicago and GST 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 GST is 6:00 PM in Chicago.
- Watching a live event or market open: Chicago viewers need 6:00 PM in GST to catch a 9:00 AM start there, and 3:00 PM if the event is anchored to Chicago.
- Always state the zone abbreviation, not just the hour. "3:00 PM CDT" is unambiguous; "3 PM" across a +9h gap is not.
- With a +9h gap there is no shared 9-to-5 window, so alternate the early start: one week Chicago takes the early slot, the next week GST 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 +9h 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 GST (Gulf Standard Time)
Gulf Standard Time (GST) is the time zone used in the United Arab Emirates, Oman, and other Gulf states. GST does not observe daylight saving time. Dubai and Abu Dhabi, major international business and tourism hubs, operate on GST.
Best time to call between Chicago and GST
With a +9h offset there is no overlap inside a normal 9 AM – 5 PM day. GST opens at 9:00 AM GST, which is 6:00 PM in Chicago, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
Chicago and GST have no shared working hours because of the +9h gap. Teams need to alternate early starts or rely on asynchronous handovers.
Chicago is 9 hours ahead of GST (CDT UTC-05:00 → GST UTC+04:00). 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
GST
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 GST?
Chicago (CDT, UTC-05:00) is 9 hours ahead of GST (GST, UTC+04:00). The gap is currently +9h.
How do I convert Chicago time to GST time?
Add +9h to Chicago local time. For example, 9:00 AM in Chicago is 6:00 PM in GST.
What time is it in GST right now?
GST uses GST at UTC+04:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +9h offset from Chicago.
What is the best time to call GST from Chicago?
There is no shared working-hours window because of the +9h gap. The closest option is 1:00 PM in Chicago, which is 10:00 PM in GST.
Which is ahead, Chicago or GST?
Chicago is 9 hours ahead of GST. When it is 12:00 PM in Chicago it is 9:00 PM in GST.
Do Chicago and GST use different time zones?
Chicago (USA) uses CDT at UTC-05:00, while GST uses GST at UTC+04:00. The IANA identifiers are America/Chicago and Asia/Dubai.
Does daylight saving time affect the Chicago–GST difference?
Yes at the moment: Chicago is on daylight saving time and GST is not, so the +9h 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 GST?
Not normally. The +9h gap only pushes the date over for late-evening times.
What is the time difference between Chicago and GST?
GST is +9h 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 GST in?
GST 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 GST timezone?
Major cities in the GST timezone include Dubai, Abu Dhabi, Muscat, Baku, Tbilisi.
What is the UTC offset for GST?
Gulf Standard Time (GST) is at UTC+04:00.
What should I know about the GST timezone?
Dubai uses GST year-round with no daylight saving time. GST is 9 hours ahead of EST and 4 hours ahead of GMT.
When is it midnight in Chicago, what time is it in GST?
When it is 12:00 AM (midnight) in Chicago (CST), it is +9h later in GST (GST).
Related Developer Tools
Explore more tools that work great with timezone conversions for international teams:
Related Timezone Conversions
More Chicago time conversions
- chicago to new york
- chicago to los angeles
- chicago to denver
- chicago to honolulu
- chicago to anchorage
- chicago to cst
- chicago to cdt
- chicago to toronto
- chicago to vancouver
- chicago to mexico city
- chicago to sao paulo
- chicago to buenos aires
- chicago to bogota
- chicago to lima
- chicago to santiago
- chicago to london
- chicago to dubai
- chicago to tokyo
- chicago to singapore
- chicago to sydney
- chicago to paris
- chicago to delhi
- chicago to mumbai
- chicago to berlin
- chicago to hong kong
- chicago to kathmandu
- new york to chicago
- london to chicago
- dubai to chicago
- tokyo to chicago
- singapore to chicago
- sydney to chicago
- los angeles to chicago
- paris to chicago
- delhi to chicago
- mumbai to chicago
See every conversion from Chicago →·See every conversion from GST →