EST to AST Converter
AST is 1 hour ahead of EST. 9:00 AM EST = 10:00 AM AST.
AST is 1 hour ahead of EST. To convert EST to AST, add 1 hour to the EST time: 9:00 AM EST = 10:00 AM AST.
EST (Eastern Time) is used in New York, Washington DC, Florida, Georgia, Ohio, Michigan, Ontario, Quebec, Panama and Jamaica (all year). AST (Atlantic Time) is used in Nova Scotia, New Brunswick, PEI; Puerto Rico and the Eastern Caribbean (all year).
AST here is Atlantic Standard Time, not Arabia Standard Time.
EST to AST time conversion table
EST to AST on 6 Nov 2026. Today's date. Highlighted rows are 9 AM–5 PM in both places.
| EST | AST | Day |
|---|---|---|
| 12:00 AM EST | 1:00 AM AST | night |
| 1:00 AM EST | 2:00 AM AST | night |
| 2:00 AM EST | 3:00 AM AST | night |
| 3:00 AM EST | 4:00 AM AST | night |
| 4:00 AM EST | 5:00 AM AST | night |
| 5:00 AM EST | 6:00 AM AST | — |
| 6:00 AM EST | 7:00 AM AST | — |
| 7:00 AM EST | 8:00 AM AST | — |
| 8:00 AM EST | 9:00 AM AST | — |
| 9:00 AM EST | 10:00 AM AST | work hours |
| 10:00 AM EST | 11:00 AM AST | work hours |
| 11:00 AM EST | 12:00 PM AST | work hours |
| 12:00 PM EST | 1:00 PM AST | work hours |
| 1:00 PM EST | 2:00 PM AST | work hours |
| 2:00 PM EST | 3:00 PM AST | work hours |
| 3:00 PM EST | 4:00 PM AST | work hours |
| 4:00 PM EST | 5:00 PM AST | — |
| 5:00 PM EST | 6:00 PM AST | — |
| 6:00 PM EST | 7:00 PM AST | — |
| 7:00 PM EST | 8:00 PM AST | — |
| 8:00 PM EST | 9:00 PM AST | — |
| 9:00 PM EST | 10:00 PM AST | night |
| 10:00 PM EST | 11:00 PM AST | night |
| 11:00 PM EST | 12:00 AM AST | next day |
- Work rows — 9 AM–5 PM in both places
- Night in the destination (10 PM–6 AM)
How to convert EST to AST
Add 1 hour to the EST time to get AST.
Example: 9:00 AM EST = 10:00 AM AST.
Across midnight: 11:00 PM EST = 12:00 AM AST (next day). The date changes, so always check the day as well as the hour.
Time difference between EST and AST
The time difference between EST and AST is 1 hour all year – AST is ahead of EST.
EST and AST during daylight saving time
- 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).
- 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).
Best time for a meeting between EST and AST
EST and AST share 7 hours of the 9 AM–5 PM working day. Any time between 9:00 AM and 4:00 PM EST lands between 10:00 AM and 5:00 PM AST, inside working hours for both.
EST to AST FAQ
What is the time difference between EST and AST?
AST is 1 hour ahead of EST all year. 9:00 AM EST = 10:00 AM AST.
What is 9 AM EST in AST?
9:00 AM EST is 10:00 AM AST.
What is 12 PM (noon) EST in AST?
12:00 PM EST is 1:00 PM AST.
Is AST ahead of or behind EST?
AST is 1 hour ahead of EST, so it is later in AST than in EST.
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.
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.
What is the best time for a meeting between EST and AST?
EST and AST share 7 hours of the 9 AM–5 PM working day. Any time between 9:00 AM and 4:00 PM EST lands between 10:00 AM and 5:00 PM AST, 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 AST to EST
Convert EST to other time zones
Convert other time zones to AST
Learn more
Updated 6 November 2026. Time zone data: IANA tz database.