What is AST in CST?
Central Time is 2 hours behind
Convert a time
CST — Central Time
2:00 am
CST, Sat
- Time in Halifax
- 4:28:34 AM
- Time in Chicago
- 2:28:34 AM
- Difference
- −2 h
- Next clock change
- March 14, 2027
Daylight saving
Atlantic Time
Clocks go forward one hour — 2:00 am becomes 3:00 am local time, and the zone is on ADT after that.
Central Time
Clocks go forward one hour — 2:00 am becomes 3:00 am local time, and the zone is on CDT after that.
AST to CST conversion table
Every hour of Saturday, November 7, 2026, converted from Atlantic Time to Central Time. 2 of the 24 hours fall on a different calendar day in Chicago, which is marked.
- 12:00 am AST
- 10:00 pm CST−1 day
- 1:00 am AST
- 11:00 pm CST−1 day
- 2:00 am AST
- 12:00 am CST
- 3:00 am AST
- 1:00 am CST
- 4:00 am AST
- 2:00 am CST
- 5:00 am AST
- 3:00 am CST
- 6:00 am AST
- 4:00 am CST
- 7:00 am AST
- 5:00 am CST
- 8:00 am AST
- 6:00 am CST
- 9:00 am AST
- 7:00 am CST
- 10:00 am AST
- 8:00 am CST
- 11:00 am AST
- 9:00 am CST
- 12:00 pm AST
- 10:00 am CST
- 1:00 pm AST
- 11:00 am CST
- 2:00 pm AST
- 12:00 pm CST
- 3:00 pm AST
- 1:00 pm CST
- 4:00 pm AST
- 2:00 pm CST
- 5:00 pm AST
- 3:00 pm CST
- 6:00 pm AST
- 4:00 pm CST
- 7:00 pm AST
- 5:00 pm CST
- 8:00 pm AST
- 6:00 pm CST
- 9:00 pm AST
- 7:00 pm CST
- 10:00 pm AST
- 8:00 pm CST
- 11:00 pm AST
- 9:00 pm CST
Scheduling between the two
Working hours overlap from 11:00 am to 6:00 pm AST, which is 9:00 am to 4:00 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.
A note on CST: it can also mean China Standard Time (UTC+8) and Cuba Standard Time (UTC−5). This page means US Central Time.
Atlantic Time (AST) is used in Nova Scotia, New Brunswick and Puerto Rico
Central Time (CST) is used in Dallas, Houston, Mexico City and Winnipeg
Other conversions
- CST to AST
- AST to UTC
- AST to GMT
- AST to EST
- 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 Mexico City
- 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