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CLST/CLT

Chile Summer Time

UTC−3

12am

3am

6am

9am

12pm

3pm

6pm

9pm

CLT is not used on this date.

This converter uses CLST (UTC−3), as in Santiago.

Keep CLT (UTC−4)

CDT/CST

Central Daylight Time

UTC−5

2h behind

12am

3am

6am

9am

12pm

3pm

6pm

9pm

Central Time is on daylight saving time: CDT (UTC−5) until Sun, Nov 1.

Mexico City and Saskatchewan stay on CST (UTC−6).

Chicago · CDT (UTC−5)Mexico City, Saskatchewan · CST all year (UTC−6)

Quick answers

Selected conversion

9:00 am09:00 CLST (UTC-3), Oct 14, 2026 = 7:00 am07:00 CDT (UTC-5), Oct 14, 2026

CLST is 2 hours ahead of CDT.

CLT and CST (US winter time, UTC-6) examples

These examples always use CLT (UTC-4) and CST (UTC-6). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.

CLT is 2 hours ahead of CST.

CST is US Central winter time (early November to mid-March). The rest of the year Chicago uses CDT (UTC-5), one hour later. For Central Time that follows daylight saving time, use CLT to CT. For daylight-time examples, use CLT to CDT.

How the time difference changes

Depending on seasonal clock changes, CLT is 1 hour ahead of CDT, CLST is 2 hours ahead of CDT, or CLST is 3 hours ahead of CST.

Depending on seasonal clock changes, working hours of 9:00 am to 5:00 pm in CLT correspond to 8:00 am to 4:00 pm in CDT, working hours of 9:00 am to 5:00 pm in CLST correspond to 7:00 am to 3:00 pm in CDT, or working hours of 9:00 am to 5:00 pm in CLST correspond to 6:00 am to 2:00 pm in CST.Depending on seasonal clock changes, working hours of 09:00 to 17:00 in CLT correspond to 08:00 to 16:00 in CDT, working hours of 09:00 to 17:00 in CLST correspond to 07:00 to 15:00 in CDT, or working hours of 09:00 to 17:00 in CLST correspond to 06:00 to 14:00 in CST.

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

Time Difference

Chile Summer Time is 2 hours ahead of Central Daylight Time.
9:00 am09:00 in CLST is 7:00 am07:00 in CDT

CLST to CDT call time
Best time for a conference call or a meeting is between 11am-5pm11:00-17:00 in CLST which corresponds to 9am-3pm09:00-15:00 in CDT

9:00 am09:00 Chile Summer Time (CLST). Offset UTC -3:00 hours
7:00 am07:00 Central Daylight Time (CDT). Offset UTC -5:00 hours

9:00 am09:00 CLST / 7:00 am07:00 CDT

Choose an hour to update the converter. Day labels such as “next day” or “+1” are relative to the selected date in the first column. Use Up and Down arrow keys, Home or End to move between hours, then Enter or Space to select.

Hourly time comparison
CLST	CDT
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Chile Standard Time

Offset: CLT is 4 hours behind Greenwich Mean Time (GMT).

Countries using this time zone: Chile

Principal Cities: The largest city in the CLT time zone is Santiago in Chile, with about 4.837 million people. Other major cities in this time zone include Antofagasta, Viña del Mar, Valparaíso, Puerto Montt.

Map of the areas on Chile Standard Time (CLT) — CLT part of the year
Today the shaded areas are on UTC−3.
Open the world time zone map © OpenStreetMap

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

End: Chile Standard Time (CLT) ended on Sunday, September 6, 2026 at 12:00 am00:00 local time and clocks were set one hour forward to Sunday, September 6, 2026, 1:00 am01:00 local daylight time instead. Standard time ends annually on the first Sunday of September.

Start: Chile Standard Time (CLT) starts on Sunday, April 4, 2027 at 12:00 am00:00 local time and clocks are set one hour back to Saturday, April 3, 2027, 11:00 pm23:00. Standard time starts annually on the first Sunday of April.

See upcoming clock changes worldwide.

CLT representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data

-04 - basic short
-0400 - basic
-04:00 - extended

Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers

-0400 - sign character (-) followed by a four digit time providing hours (04) and minutes (00) of the offset. Indicates an offset of four hours to the west of the zero meridian.

Military/NATO: Used by the U.S. military, Chinese military and others

Quebec - Military abbreviation for CLT
Q - short form of 'Quebec'

Time zones with the GMT -4 offset:

AST - Atlantic Standard Time
EDT - Eastern Daylight Time
AMT - Amazon Time
BOT - Bolivia Time
CDT - Cuba Daylight Time
CLT - Chile Standard Time
FKT - Falkland Island Time
GYT - Guyana Time
HLV - Hora Legal de Venezuela
PYT - Paraguay Time
Q - Quebec Time Zone
VET - Venezuelan Standard Time

Central Standard Time

Offset: CST is 6 hours behind Greenwich Mean Time (GMT).

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, Puebla, Santiago de Querétaro.

French: HNC - Heure Normale du Centre

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

Map of the areas on Central Standard Time (CST) — CST all year CST part of the year
Today the lighter areas are on UTC−5 (Central Daylight Time).
Open the world time zone map © OpenStreetMap

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).

End: Central Standard Time (CST) ended on Sunday, March 8, 2026 at 2:00 am02:00 local time and clocks were set one hour forward to Sunday, March 8, 2026, 3:00 am03:00 local daylight time instead. Standard time ends annually on the second Sunday of March.

Start: Central Standard Time (CST) starts on Sunday, November 1, 2026 at 2:00 am02:00 local time and clocks are set one hour back to Sunday, November 1, 2026, 1:00 am01:00. Standard time starts annually on the first Sunday of November.

See upcoming clock changes worldwide.

CST representations, usage and related time zones