Chicago to BRT
+2hChicago
CDTSOURCEBRT
BRTGreen rows indicate typical business hours (9 AM - 5 PM)
CDT and BRT on the World Map
The map below highlights the CDT (Central Standard Time) and BRT (Brasilia 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.
BRT – Brasilia Time
UTC-03:00Brasilia Time (BRT) is the time zone for eastern Brazil, 3 hours behind UTC.
- •Brazil abolished daylight saving time in 2019.
- •São Paulo is the largest city in the Southern Hemisphere.
- •BRT is 2 hours ahead of EST.
- •Brazil spans four different time zones.
- •The B3 stock exchange in São Paulo operates on BRT.
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 +2h Gap: Chicago vs BRT
Chicago runs on Central Daylight Time (CDT) at UTC-05:00, currently observing daylight saving time. BRT runs on Brasilia Time (BRT) at UTC-03:00. That puts Chicago 2 hours ahead of BRT — a difference of +2h at the current offsets.
In practice, when it is 9:00 AM in Chicago it is 11:00 AM in BRT. Midnight in Chicago is 2:00 AM in BRT.Chicago observes daylight saving time while BRT does not, so the gap narrows or widens by an hour part of the year.
Chicago to BRT time conversion table
| Chicago (CDT) | BRT (BRT) | Day |
|---|---|---|
| 12:00 AM | 2:00 AM | same day |
| 6:00 AM | 8:00 AM | same day |
| 7:00 AM | 9:00 AM | same day |
| 8:00 AM | 10:00 AM | same day |
| 9:00 AM | 11:00 AM | same day |
| 12:00 PM | 2:00 PM | same day |
| 3:00 PM | 5:00 PM | same day |
| 5:00 PM | 7:00 PM | same day |
| 6:00 PM | 8:00 PM | same day |
| 9:00 PM | 11:00 PM | same day |
Why people convert Chicago to BRT time
- Scheduling a call from Chicago to BRT: a 10:00 AM start in Chicago lands at 12:00 PM in BRT, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both Chicago and BRT are inside the 9-to-5 working day between 9:00 AM and 3:00 PM CDT time (11:00 AM–5:00 PM BRT). That is roughly 6 hours of usable overlap.
- Watching a live event or market open: Chicago viewers need 11:00 AM in BRT to catch a 9:00 AM start there, and 10:00 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 +2h gap is not.
- Block 9:00 AM–3:00 PM CDT as the recurring meeting window if you work primarily from Chicago and need BRT colleagues present.
- Chicago: Clocks fall back on Sun, Nov 1, 2026. Re-check this page after that date because the offset changes and so does the +2h 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 BRT (Brasilia Time)
Brasilia Time (BRT) is the standard time in the most populous regions of Brazil, including São Paulo, Rio de Janeiro, and the capital Brasília. Brazil abolished daylight saving time in 2019, so BRT is now observed year-round in these regions. Brazil spans four time zones in total.
Best time to call between Chicago and BRT
Both Chicago and BRT sit inside the 9 AM – 5 PM working day between 9:00 AM–3:00 PM CDT, which is 11:00 AM–5:00 PM BRT. That gives roughly 6 hours of shared time — the safest window for a live call or meeting.
Business hours overlap
Chicago and BRT share 6 hours of working-hours overlap (9:00 AM–3:00 PM CDT), so scheduling a live meeting is straightforward.
Chicago is 2 hours ahead of BRT (CDT UTC-05:00 → BRT UTC-03:00). The shared working window is 9:00 AM–3:00 PM CDT. 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
BRT
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 BRT?
Chicago (CDT, UTC-05:00) is 2 hours ahead of BRT (BRT, UTC-03:00). The gap is currently +2h.
How do I convert Chicago time to BRT time?
Add +2h to Chicago local time. For example, 9:00 AM in Chicago is 11:00 AM in BRT.
What time is it in BRT right now?
BRT uses BRT at UTC-03:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +2h offset from Chicago.
What is the best time to call BRT from Chicago?
Call between 9:00 AM and 3:00 PM CDT — that maps to 11:00 AM–5:00 PM BRT and keeps both parties inside the working day.
Which is ahead, Chicago or BRT?
Chicago is 2 hours ahead of BRT. When it is 12:00 PM in Chicago it is 2:00 PM in BRT.
Do Chicago and BRT use different time zones?
Chicago (USA) uses CDT at UTC-05:00, while BRT uses BRT at UTC-03:00. The IANA identifiers are America/Chicago and America/Sao_Paulo.
Does daylight saving time affect the Chicago–BRT difference?
Yes at the moment: Chicago is on daylight saving time and BRT is not, so the +2h 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 BRT?
Not normally. The +2h gap only pushes the date over for late-evening times.
What is the time difference between Chicago and BRT?
BRT is +2h 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 BRT in?
BRT 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 BRT timezone?
Major cities in the BRT timezone include São Paulo, Rio de Janeiro, Brasília, Belo Horizonte, Salvador, Fortaleza, Recife, Curitiba.
What is the UTC offset for BRT?
Brasilia Time (BRT) is at UTC-03:00.
What should I know about the BRT timezone?
Brazil abolished daylight saving time in 2019. São Paulo is the largest city in the Southern Hemisphere.
When is it midnight in Chicago, what time is it in BRT?
When it is 12:00 AM (midnight) in Chicago (CST), it is +2h later in BRT (BRT).
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