CST
Central Standard Time
GMT -6
12am
3am
6am
9am
12pm
3pm
6pm
9pm
Brazil
BRT
12am
3am
6am
9am
12pm
3pm
6pm
9pm

Compare CST time with Rio de Janeiro time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.

Time Difference

Central Standard Time is 3 hours behind BRT (Brasilia Time)
6:00 am06:00 in CST is 9:00 am09:00 in Rio de Janeiro, Brazil

CST to Rio de Janeiro call time
Best time for a conference call or a meeting is between 9am-2pm in CST which corresponds to 12pm-5pm in Rio de Janeiro

6:00 am06:00 Central Standard Time (CST). Offset UTC -6:00 hours
9:00 am09:00 BRT (Brasilia Time) (Rio de Janeiro, Brazil). Offset UTC -3:00 hours

6:00 am06:00 CST / 9:00 am09:00 Rio de Janeiro, Brazil

CSTRio de Janeiro, Brazil
12am (midnight)3am
1am4am
2am5am
3am6am
4am7am
5am8am
6am9am
7am10am
8am11am
9am12pm (noon)
10am1pm
11am2pm
12pm (noon)3pm
1pm4pm
2pm5pm
3pm6pm
4pm7pm
5pm8pm
6pm9pm
7pm10pm
8pm11pm
9pm12am (midnight)
10pm1am
11pm2am
00:0003:00
01:0004:00
02:0005:00
03:0006:00
04:0007:00
05:0008:00
06:0009:00
07:0010:00
08:0011:00
09:0012:00
10:0013:00
11:0014:00
12:0015:00
13:0016:00
14:0017:00
15:0018:00
16:0019:00
17:0020:00
18:0021:00
19:0022:00
20:0023:00
21:0000:00
22:0001:00
23:0002:00

Central Standard Time

Offset: CST is 6 hours behind Greenwich Mean Time (GMT) and is used in North America

Countries using this time zone: Belize, Canada, Costa Rica, Guatemala, Honduras, Mexico, Nicaragua, El Salvador, United States

Principal Cities: The largest city in the CST time zone is Mexico City in Mexico, with about 12.294 million people. Other major cities in this time zone include Chicago, Houston, Iztapalapa, Ecatepec.

French: HNC - Heure Normale du Centre

Spanish: CT - Tiempo Central Estándar, CT - Zona Centro

CST Time Zone Geo Map
CST timezone map

Daylight Saving: This is a standard time zone. During summer, some places set clocks forward one hour for daylight saving time and observe Central Daylight Time (CDT).

Daylight saving time clock moves back for one hour from 2am to 1amStart: Central Standard Time (CST) started on Sunday, November 2, 2025 at 2:00 am local time and clocks were set one hour back to Sunday, November 2, 2025, 1:00 am. Standard time starts annually on the first Sunday of November.

Daylight saving time clock moves forward for one hour from 2am to 3amEnd: Central Standard Time (CST) ends on Sunday, March 8, 2026 at 2:00 am local time and clocks are set one hour forward to Sunday, March 8, 2026, 3:00 am local daylight time instead. Standard time ends annually on the second Sunday of March.

CST representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • -06 - basic short
  • -0600 - basic
  • -06:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • -0600 - sign character (-) followed by a four digit time providing hours (06) and minutes (00) of the offset. Indicates an offset of six hours to the west of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Sierra - Military abbreviation for CST
  • S - short form of 'Sierra'
IANA/Olson: Reflects CST time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • America/Bahia_Banderas
  • America/Belize
  • America/Chicago
  • America/Chihuahua
  • America/Costa_Rica
  • America/El_Salvador
  • America/Guatemala
  • America/Indiana/Knox
  • America/Indiana/Tell_City
  • America/Knox_IN
  • America/Managua
  • America/Matamoros
  • America/Menominee
  • America/Merida
  • America/Mexico_City
  • America/Monterrey
  • America/North_Dakota/Beulah
  • America/North_Dakota/Center
  • America/North_Dakota/New_Salem
  • America/Ojinaga
  • America/Rainy_River
  • America/Rankin_Inlet
  • America/Regina
  • America/Resolute
  • America/Swift_Current
  • America/Tegucigalpa
  • America/Winnipeg
  • CST6CDT
  • Canada/Central
  • Canada/Saskatchewan
  • Mexico/General
  • US/Central
  • US/Indiana-Starke
CST Abbreviation: Several time zones share CST abbreviation and it could refer to these time zones
  • Central Standard Time - UTC -6
  • China Standard Time - UTC +8
  • Cuba Standard Time - UTC -5
Time zones with the GMT -6 offset:
  • CST - Central Standard Time
  • CT - Central Time
  • MDT - Mountain Daylight Time
  • EAST - Easter Island Standard Time
  • GALT - Galapagos Time
  • S - Sierra Time Zone

Rio de Janeiro Information

Time Zone

Abbreviation / Name
BRT - Brasília time
UTC / GMT Offset
-3:00 hours during Brasília time, currently in use.

Rio de Janeiro Facts

Country
Brazil
Alternative Names
Ciutat de Rio de Janeiro, RIO, Rio, Rio De Janeiro, Rio d Janeiro, Rio de Janeiro, Rio de Janeiru, Rio de Janero, Rio de Janeyro, Rio de Janèro, Rio de Janêro, Rio de Zaneiras, Rio de Zaneiros, Rio de Zaneyro, Rio de Zhaneiro, Rio de Zhanejro, Rio de Žaneiras, Rio dé Janéyro, Rio dė Žaneiros, Rio nte Tzaneiro, Rio-de-Janejro, Rio-de-Janeyro, Rio-de-Zaneiro, Rio-de-Zanejro, Rio-de-Zaneyro, Rio-de-Zhanejro, Rio-de-janeiro, Rio-de-Ĵanejro, Rio-de-Žaneiro, Rio-de-Žaneýro, Riodezaneiro, Riodežaneiro, Riu de Janeiro, Riu de Janeiru, Riviethe de Janvyi, Riviéthe dé Janvyi, Rya-deh-Zhanehjra, Río de Janeiro, Sao Sebastiao do Rio de Janeiro, São Sebastião do Rio de Janeiro, Urbs Fluminensis, iriyo ti ceniro, li yue re nei lu, liudejaneilu, rath ri xode ca ne ro, ri xode ca ne ro, ri'o di janero, ri'o di jeneri'o, ri'o di jeniro, rio-de-zhaneiro, riodejaneiro, rios. dis. djaneiros, riyea di janirea, riyo di janairo, riyo di janero, riyo di jeneriyo, riyo di jenero, riyo di jyaneriyo, ryw dh znyyrw, ryw dw zhanyrw, ryw dwzhanyrw, ryw dy janyrw, Ρίο ντε Τζανέιρο, Рио де Жанеиро, Рио де Жанейро, Рио-де-Жанейро, Рыа-дэ-Жанэйра, Ріо де Жанейро, Ріо-де-Жанейро, Ռիո դե Ժանեյրո, ריא דע זשאנערא, ריו דה זניירו, ريو دى جانيرو, ريو دي جانيرو, ریو دو ژانیرو, ریو دوژانیرو, ریو دے جینیرو, ریو ڈی جینرو, ڕیۆ دێ ژانێرۆ, रियो डि जेनेरो, रियो दि जानेरो, रियो दि ज्यानेरियो, रियो दी जेनेरियो, রিও ডি জেনিরো, রিও দি জেনেরিও, ਰਿਓ ਡੀ ਜਨੇਰੋ, இரியோ டி செனீரோ, ರಿಯೋ ಡಿ ಜನೈರೊ, റിയോ ഡി ജനീറോ, รัฐรีโอเดจาเนโร, รีโอเดจาเนโร, རིའོ་ཌེ་ཇ་ནེའུ་རའོ།, ရီယို ဒီ ဂျီးနေးရိုးမြို့, რიო-დე-ჟანეირო, ሪዮ ዴ ጃኔይሮ, リオデジャネイロ, 里約熱內盧, 里约热内卢, 리우데자네이루
Population
6,023,699
Currency
Real (BRL)
Geographic Coordinates
22° 54' S Latitude / 43° 10' W Longitude
International Dialing Code
+55