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CST to AST: Central Time to Atlantic Time

2 hours ahead of CST

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

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

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CST to AST conversion table

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

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

About these time zones

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).

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).

Questions about CST and AST time

What is the time difference between CST and AST?

The current difference is shown at the top of this page. CST uses Central Standard Time (CST, UTC−6) as standard time and Central Daylight Time (CDT, UTC−5) during daylight saving time; AST uses Atlantic Standard Time (AST, UTC−4) as standard time and Atlantic Daylight Time (ADT, UTC−3) 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 CST, what time is it in AST?

On Tuesday, November 3, 2026, 9:00 AM in CST was 11:00 AM in AST. The conversion table above shows today’s values.

Do the clocks change in CST or AST?

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

Is CST the same as CDT?

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

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