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AST to CST: Atlantic Time to Central Time

2 hours behind AST

CST compared with AST, right now. Swap: CST to AST ⇄

ASTTuesday, November 3, 2026AST · UTC−4CSTTuesday, November 3, 2026CST · UTC−6

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AST to CST conversion table

For Tuesday, November 3, 2026. Rows where both places are inside 9 AM–5 PM are highlighted.

ASTCST
12:00 AM10:00 PM (previous day)
1:00 AM11:00 PM (previous day)
2:00 AM12:00 AM
3:00 AM1:00 AM
4:00 AM2:00 AM
5:00 AM3:00 AM
6:00 AM4:00 AM
7:00 AM5:00 AM
8:00 AM6:00 AM
9:00 AM7:00 AM
10:00 AM8:00 AM
11:00 AM9:00 AM
12:00 PM10:00 AM
1:00 PM11:00 AM
2:00 PM12:00 PM
3:00 PM1:00 PM
4:00 PM2:00 PM
5:00 PM3:00 PM
6:00 PM4:00 PM
7:00 PM5:00 PM
8:00 PM6:00 PM
9:00 PM7:00 PM
10:00 PM8:00 PM
11:00 PM9:00 PM

About these time zones

AST: Atlantic Standard Time

Atlantic Time (AST/ADT). Nova Scotia, New Brunswick and Prince Edward Island (with daylight saving), plus Puerto Rico and much of the Caribbean, which stay on AST (UTC−4) all year.

Sunday, March 14, 2027: clocks go forward 1 hour at 2:00 AM local time (UTC−4 → UTC−3).

CST: Central Standard Time

Central Time (CST/CDT). Chicago, Dallas, Houston, Austin, Minneapolis, New Orleans and Winnipeg. CST is UTC−6; in summer the region uses CDT, UTC−5.

Sunday, March 14, 2027: clocks go forward 1 hour at 2:00 AM local time (UTC−6 → UTC−5).

Questions about AST and CST time

What is the time difference between AST and CST?

The current difference is shown at the top of this page. AST uses Atlantic Standard Time (AST, UTC−4) as standard time and Atlantic Daylight Time (ADT, UTC−3) during daylight saving time; CST uses Central Standard Time (CST, UTC−6) as standard time and Central Daylight Time (CDT, UTC−5) during daylight saving time. The difference can change if only one side observes daylight saving time or if their clocks change on different dates. Choose your meeting date in the converter to check the applicable offset.

When it is 9:00 AM in AST, what time is it in CST?

On Tuesday, November 3, 2026, 9:00 AM in AST was 7:00 AM in CST. The conversion table above shows today’s values.

Do the clocks change in AST or CST?

AST: Sunday, March 14, 2027: clocks go forward 1 hour at 2:00 AM local time (UTC−4 → UTC−3). CST: Sunday, March 14, 2027: clocks go forward 1 hour at 2:00 AM local time (UTC−6 → UTC−5).

Is AST the same as ADT?

AST is the standard-time name and ADT the daylight-saving name for Atlantic Time. People often say AST all year; this converter uses the time actually in effect on the date you choose.

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