Updating current time…
MexicoCST
UTC−6
12am
3am
6am
9am
12pm
3pm
6pm
9pm
ADT/AST
UTC−3
3h ahead
12am
3am
6am
9am
12pm
3pm
6pm
9pm
Atlantic Time is on daylight saving time: ADT (UTC−3) until Sun, Nov 1.

Quick answers

Selected conversion

6:00 am06:00 CST (UTC-6), Oct 15, 2026 = 9:00 am09:00 ADT (UTC-3), Oct 15, 2026

León de los Aldama is 3 hours behind ADT.

How the time difference changes

For most of the year, Leon de los Aldama is 3 hours behind ADT. From Nov 1, 2026 to Mar 14, 2027, Leon de los Aldama is 2 hours behind AST.

For most of the year, working hours of 9:00 am to 6:00 pm in Leon de los Aldama correspond to 12:00 pm to 9:00 pm in ADT. At other times of the year, working hours of 9:00 am to 6:00 pm in Leon de los Aldama correspond to 11:00 am to 8:00 pm in AST.For most of the year, working hours of 09:00 to 18:00 in Leon de los Aldama correspond to 12:00 to 21:00 in ADT. At other times of the year, working hours of 09:00 to 18:00 in Leon de los Aldama correspond to 11:00 to 20:00 in AST.

Compare Leon de los Aldama time with AST time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.

Time Difference

CST (Central Standard Time) is 3 hours behind Atlantic Daylight Time.
6:00 am06:00 in Leon de los Aldama, Mexico is 9:00 am09:00 in ADT

León de los Aldama to ADT call time
Best time for a conference call or a meeting is between 9am-3pm09:00-15:00 in León de los Aldama which corresponds to 12pm-6pm12:00-18:00 in ADT

6:00 am06:00 CST (Central Standard Time) (Leon de los Aldama, Mexico). Offset UTC -6:00 hours
9:00 am09:00 Atlantic Daylight Time (ADT). Offset UTC -3:00 hours

6:00 am06:00 Leon de los Aldama, Mexico / 9:00 am09:00 ADT

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León de los Aldama Time Zone and Facts

Time Zone

Abbreviation / Offset
CST – Central Standard Time, UTC-6 (no daylight saving time)

León de los Aldama Facts

Country
Mexico
Alternative Names
BJX, Ciudad de Leon, Ciudad de León, Leon, Leon Guanajuato, Leon de los Aldama, Leon de los Aldamas, León, León de los Aldama, León de los Aldamas, reon, レオン
Population
1,579,803
Currency
Peso (MXN)
Geographic Coordinates
21° 07' N Latitude / 101° 40' W Longitude
International Dialing Code
+52
More About León de los Aldama

Atlantic Standard Time

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

Countries using this time zone: Antigua & Barbuda, Anguilla, Aruba, Barbados, St Barthelemy, Bermuda, Caribbean NL, Canada, Curaçao, Dominica, Dominican Republic, Grenada, Greenland, Guadeloupe, St Kitts & Nevis, St Lucia, St Martin (French), Martinique, Montserrat, Puerto Rico, St Maarten (Dutch), Trinidad & Tobago, St Vincent, Virgin Islands (UK), Virgin Islands (US)

Principal Cities: The largest city in the AST time zone is Santo Domingo in the Dominican Republic, with about 2.202 million people. Other major cities in this time zone include Santiago de los Caballeros, Halifax, San Juan, San Pedro de Macorís.

French: HNA - Heure Normale de l'Atlantique

Spanish: AST - Tiempo Estándar del Atlántico

Map of the areas on Atlantic Standard Time (AST)
AST all year AST part of the year

Today the lighter areas are on UTC−3 (ADT).

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

123456789101112End: Atlantic Standard Time (AST) 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.

123456789101112Start: Atlantic Standard Time (AST) 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.

AST 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 AST
  • Q - short form of 'Quebec'
IANA/Olson: Reflects AST time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • America/Anguilla
  • America/Antigua
  • America/Aruba
  • America/Barbados
  • America/Blanc-Sablon
  • America/Curacao
  • America/Dominica
  • America/Glace_Bay
  • America/Goose_Bay
  • America/Grenada
  • America/Guadeloupe
  • America/Halifax
  • America/Kralendijk
  • America/Lower_Princes
  • America/Marigot
  • America/Martinique
  • America/Moncton
  • America/Montserrat
  • America/Port_of_Spain
  • America/Puerto_Rico
  • America/Santo_Domingo
  • America/St_Barthelemy
  • America/St_Kitts
  • America/St_Lucia
  • America/St_Thomas
  • America/St_Vincent
  • America/Thule
  • America/Tortola
  • America/Virgin
  • Atlantic/Bermuda
  • Canada/Atlantic
AST Abbreviation: Several time zones share AST abbreviation and it could refer to these time zones
  • Atlantic Standard Time - UTC -4
  • Arabia Standard Time - UTC +3
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