TimeToZone

AST to UTC Converter

UTC is 4 hours ahead of AST. 9:00 AM AST = 1:00 PM UTC.

⇄ Swap
ASTfrom
Atlantic Standard Time
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UTC
Coordinated Universal Time
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UTC is 4 hours ahead of AST at the moment. To convert AST to UTC, add 4 hours to the AST time: 9:00 AM AST = 1:00 PM UTC.

AST (Atlantic Time) is used in Nova Scotia, New Brunswick, PEI; Puerto Rico and the Eastern Caribbean (all year). UTC (UTC) is used in The world's time standard; used in aviation, computing and science.

AST here is Atlantic Standard Time, not Arabia Standard Time.

AST to UTC time conversion table

AST to UTC on 7 Nov 2026. Today's date. Highlighted rows are 9 AM–5 PM in both places.

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

Conversion table from AST to UTC for 7 Nov 2026. A tick marks hours that fall between 9 AM and 5 PM in both places. +1 means the next day in UTC, −1 the previous day.

  • ✓ marks 9 AM–5 PM in both places
  • Greyed times are night in the destination (10 PM–6 AM)

How to convert AST to UTC

Add 4 hours to the AST time to get UTC.

Example: 9:00 AM AST = 1:00 PM UTC.

Across midnight: 10:00 PM AST = 2:00 AM UTC (next day). The date changes, so always check the day as well as the hour.

Time difference between AST and UTC

The time difference between AST and UTC is not the same all year, because the two sides change for daylight saving time on different dates. In 2026 it works out like this:

  • 31 Dec 2025 – 7 Mar 2026: UTC is 4 hours ahead of AST.
  • 8 Mar 2026 – 31 Oct 2026: UTC is 3 hours ahead of AST.
  • 1 Nov 2026 – 30 Dec 2026: UTC is 4 hours ahead of AST.

AST and UTC during daylight saving time

  • AST next changes on 14 Mar 2027: clocks go forward one hour at 01:59 local time, from AST (UTC−4) to ADT (UTC−3).
  • UTC does not observe daylight saving time; it stays on UTC+0 all year.

Best time for a meeting between AST and UTC

AST and UTC share 4 hours of the 9 AM–5 PM working day. Any time between 9:00 AM and 1:00 PM AST lands between 1:00 PM and 5:00 PM UTC, inside working hours for both.

Plan a meeting across more time zones.

AST to UTC FAQ

What is the time difference between AST and UTC?

Right now UTC is 4 hours ahead of AST. The gap changes 3 times in 2026 because the two sides switch to daylight saving time on different dates.

What is 9 AM AST in UTC?

9:00 AM AST is 1:00 PM UTC.

What is 12 PM (noon) AST in UTC?

12:00 PM AST is 4:00 PM UTC.

Is UTC ahead of or behind AST?

UTC is 4 hours ahead of AST, so it is later in UTC than in AST.

Does AST change for daylight saving time?

Yes. AST next changes on 14 Mar 2027, when clocks go forward one hour from AST to ADT.

Does UTC change for daylight saving time?

No. UTC stays on the same offset all year, so conversions never shift for daylight saving time.

What is the best time for a meeting between AST and UTC?

AST and UTC share 4 hours of the 9 AM–5 PM working day. Any time between 9:00 AM and 1:00 PM AST lands between 1:00 PM and 5:00 PM UTC, inside working hours for both.

Related conversions

Convert UTC to AST

UTC to AST

Convert AST to other time zones

AST to AESTAST to AKSTAST to AWSTAST to Bangladesh TimeAST to BRTAST to BSTAST to CETAST to China TimeAST to SASTAST to SGTAST to WATAST to CST

Convert other time zones to UTC

IST to UTCEST to UTCPST to UTCGMT to UTCAEST to UTCBST to UTCAbbotsford Time to UTCAbidjan Time to UTCHannover Time to UTCHaora Time to UTCHarbin Time to UTCHechi Time to UTC

Learn more

AST time zoneUTC time zone

Updated 7 November 2026. Time zone data: IANA tz database.