AST to EST Converter
EST is 1 hour behind AST. 9:00 AM AST = 8:00 AM EST.
EST is 1 hour behind AST. To convert AST to EST, subtract 1 hour from the AST time: 9:00 AM AST = 8:00 AM EST.
AST (Atlantic Time) is used in Nova Scotia, New Brunswick, PEI; Puerto Rico and the Eastern Caribbean (all year). EST (Eastern Time) is used in New York, Washington DC, Florida, Georgia, Ohio, Michigan, Ontario, Quebec, Panama and Jamaica (all year).
AST here is Atlantic Standard Time, not Arabia Standard Time.
AST to EST time conversion table
AST to EST on 6 Nov 2026. Today's date. Highlighted rows are 9 AM–5 PM in both places.
| AST | EST | Day |
|---|---|---|
| 12:00 AM AST | 11:00 PM EST | previous day |
| 1:00 AM AST | 12:00 AM EST | night |
| 2:00 AM AST | 1:00 AM EST | night |
| 3:00 AM AST | 2:00 AM EST | night |
| 4:00 AM AST | 3:00 AM EST | night |
| 5:00 AM AST | 4:00 AM EST | night |
| 6:00 AM AST | 5:00 AM EST | night |
| 7:00 AM AST | 6:00 AM EST | — |
| 8:00 AM AST | 7:00 AM EST | — |
| 9:00 AM AST | 8:00 AM EST | — |
| 10:00 AM AST | 9:00 AM EST | work hours |
| 11:00 AM AST | 10:00 AM EST | work hours |
| 12:00 PM AST | 11:00 AM EST | work hours |
| 1:00 PM AST | 12:00 PM EST | work hours |
| 2:00 PM AST | 1:00 PM EST | work hours |
| 3:00 PM AST | 2:00 PM EST | work hours |
| 4:00 PM AST | 3:00 PM EST | work hours |
| 5:00 PM AST | 4:00 PM EST | — |
| 6:00 PM AST | 5:00 PM EST | — |
| 7:00 PM AST | 6:00 PM EST | — |
| 8:00 PM AST | 7:00 PM EST | — |
| 9:00 PM AST | 8:00 PM EST | — |
| 10:00 PM AST | 9:00 PM EST | — |
| 11:00 PM AST | 10:00 PM EST | night |
- Work rows — 9 AM–5 PM in both places
- Night in the destination (10 PM–6 AM)
How to convert AST to EST
Subtract 1 hour from the AST time to get EST.
Example: 9:00 AM AST = 8:00 AM EST.
Across midnight: 12:00 AM AST = 11:00 PM EST (previous day). The date changes, so always check the day as well as the hour.
Time difference between AST and EST
The time difference between AST and EST is 1 hour all year – EST is behind AST.
AST and EST 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).
- EST next changes on 14 Mar 2027: clocks go forward one hour at 01:59 local time, from EST (UTC−5) to EDT (UTC−4).
Best time for a meeting between AST and EST
AST and EST share 7 hours of the 9 AM–5 PM working day. Any time between 10:00 AM and 5:00 PM AST lands between 9:00 AM and 4:00 PM EST, inside working hours for both.
AST to EST FAQ
What is the time difference between AST and EST?
EST is 1 hour behind AST all year. 9:00 AM AST = 8:00 AM EST.
What is 9 AM AST in EST?
9:00 AM AST is 8:00 AM EST.
What is 12 PM (noon) AST in EST?
12:00 PM AST is 11:00 AM EST.
Is EST ahead of or behind AST?
EST is 1 hour behind AST, so it is earlier in EST 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 EST change for daylight saving time?
Yes. EST next changes on 14 Mar 2027, when clocks go forward one hour from EST to EDT.
What is the best time for a meeting between AST and EST?
AST and EST share 7 hours of the 9 AM–5 PM working day. Any time between 10:00 AM and 5:00 PM AST lands between 9:00 AM and 4:00 PM EST, inside working hours for both.
Is ET the same as EST?
EST is the winter (standard) name of Eastern Time (ET). From March to November the same clocks are called EDT. This converter always uses the one in force on the date you choose.
Related conversions
Convert EST to AST
Convert AST to other time zones
Convert other time zones to EST
Learn more
Updated 6 November 2026. Time zone data: IANA tz database.