What is AST in Mexico City?
Central Time – Mexico is 3 hours behind
Atlantic Time is on UTC−3:00 and Central Time – Mexico is on UTC−6:00 right now. Atlantic Time is on daylight saving, so its clocks read ADT. The gap changes during the year — see below.
- Time in Halifax
- 9:55:10 AM
- Time in Mexico City
- 6:55:10 AM
- Difference
- −3 h
- Next clock change
- November 1, 2026
Convert a time
CST — Central Time – Mexico
6:00 am
CST, Fri
When the difference changes
Atlantic Time and Central Time – Mexico do not change their clocks on the same dates, so the gap between them is not the same all year. Most converters show only today’s figure. These are the periods ahead:
- Now – November 1, 2026Central Time – Mexico is 3 hours behind
- November 1, 2026 – March 14, 2027Central Time – Mexico is 2 hours behind
- March 14, 2027 – onwardsCentral Time – Mexico is 3 hours behind
Periods shorter than a day are not listed. Each zone changes at its own local time, so on a date when both move there are a few hours when the gap is briefly something else.
Daylight saving
Atlantic Time
Clocks go back one hour — 2:00 am becomes 1:00 am local time, and the zone is on AST after that.
Central Time – Mexico
Central Time – Mexico stays on CST all year, so its offset from UTC never moves.
AST to Mexico City conversion table
Every hour of Friday, September 25, 2026, converted from Atlantic Time to Central Time – Mexico. 3 of the 24 hours fall on a different calendar day in Mexico City, which is marked.
- 12:00 am ADT
- 9:00 pm CST−1 day
- 1:00 am ADT
- 10:00 pm CST−1 day
- 2:00 am ADT
- 11:00 pm CST−1 day
- 3:00 am ADT
- 12:00 am CST
- 4:00 am ADT
- 1:00 am CST
- 5:00 am ADT
- 2:00 am CST
- 6:00 am ADT
- 3:00 am CST
- 7:00 am ADT
- 4:00 am CST
- 8:00 am ADT
- 5:00 am CST
- 9:00 am ADT
- 6:00 am CST
- 10:00 am ADT
- 7:00 am CST
- 11:00 am ADT
- 8:00 am CST
- 12:00 pm ADT
- 9:00 am CST
- 1:00 pm ADT
- 10:00 am CST
- 2:00 pm ADT
- 11:00 am CST
- 3:00 pm ADT
- 12:00 pm CST
- 4:00 pm ADT
- 1:00 pm CST
- 5:00 pm ADT
- 2:00 pm CST
- 6:00 pm ADT
- 3:00 pm CST
- 7:00 pm ADT
- 4:00 pm CST
- 8:00 pm ADT
- 5:00 pm CST
- 9:00 pm ADT
- 6:00 pm CST
- 10:00 pm ADT
- 7:00 pm CST
- 11:00 pm ADT
- 8:00 pm CST
Scheduling between the two
Working hours overlap from 12:00 pm to 6:00 pm ADT, which is 9:00 am to 3:00 pm CST. Anything inside that window falls in the normal working day at both ends.
A note on AST: it can also mean Arabia Standard Time (UTC+3). This page means Atlantic Time.
Atlantic Time (ADT) is used in Nova Scotia, New Brunswick and Puerto Rico
Central Time – Mexico (CST) is used in most of Mexico. Mexico abolished daylight saving in October 2022, so it no longer tracks US Central Time in summer.
Other conversions
- Mexico City to AST
- AST to UTC
- AST to GMT
- AST to EST
- AST to CST
- AST to MST
- AST to PST
- AST to AKST
- AST to HST
- AST to BST
- AST to CET
- AST to IST
- AST to CST (China)
- AST to JST
- AST to AEST
- AST to BRT
- AST to ART
- AST to EET
- AST to WET
- AST to MSK
- AST to TRT
- AST to SAST
- AST to WAT
- AST to EAT
- AST to GST
- AST to PKT
- AST to ICT
- AST to WIB
- AST to SGT
- AST to HKT
- AST to KST
- AST to PHT
- AST to AWST
- AST to ACST
- AST to NZST
- All zones