EDT to AST Converter & Meeting Planner
Quick answer: 9:00 AM EDT = 9:00 AM AST (fixed -04:00 standard offset — not DST-adjusted). Use the interactive converter below for DST-aware local-time scheduling.
Planning a call or meeting between Eastern Daylight Time (EDT) and Atlantic Standard Time (AST)? You need to account for the standard time difference. Atlantic Standard Time is normally 0 hours ahead of Eastern Daylight Time. Whether you are coordinating between teams in New York and Washington D.C. and Halifax and San Juan, our live tool has you covered. Use our interactive overlap studio below to find the perfect waking hours for both regions, taking into account any seasonal Daylight Saving Time (DST) changes.
24-Hour Conversion Table
Quick reference: 12:00 AM EDT = 12:00 AM AST. The full 24-hour EDT to AST table below uses fixed standard offsets for exact abbreviation searches.
Example: 3:00 PM EDT = 3:00 PM AST.
| EDT Time | AST Time |
|---|---|
| 12:00 AM (00:00) | 12:00 AM (00:00) |
| 1:00 AM (01:00) | 1:00 AM (01:00) |
| 2:00 AM (02:00) | 2:00 AM (02:00) |
| 3:00 AM (03:00) | 3:00 AM (03:00) |
| 4:00 AM (04:00) | 4:00 AM (04:00) |
| 5:00 AM (05:00) | 5:00 AM (05:00) |
| 6:00 AM (06:00) | 6:00 AM (06:00) |
| 7:00 AM (07:00) | 7:00 AM (07:00) |
| 8:00 AM (08:00) | 8:00 AM (08:00) |
| 9:00 AM (09:00) | 9:00 AM (09:00) |
| 10:00 AM (10:00) | 10:00 AM (10:00) |
| 11:00 AM (11:00) | 11:00 AM (11:00) |
| 12:00 PM (12:00) | 12:00 PM (12:00) |
| 1:00 PM (13:00) | 1:00 PM (13:00) |
| 2:00 PM (14:00) | 2:00 PM (14:00) |
| 3:00 PM (15:00) | 3:00 PM (15:00) |
| 4:00 PM (16:00) | 4:00 PM (16:00) |
| 5:00 PM (17:00) | 5:00 PM (17:00) |
| 6:00 PM (18:00) | 6:00 PM (18:00) |
| 7:00 PM (19:00) | 7:00 PM (19:00) |
| 8:00 PM (20:00) | 8:00 PM (20:00) |
| 9:00 PM (21:00) | 9:00 PM (21:00) |
| 10:00 PM (22:00) | 10:00 PM (22:00) |
| 11:00 PM (23:00) | 11:00 PM (23:00) |
Best time to call Halifax from New York
For most work calls, compare the normal business day in New York (EDT) with the business day in Halifax (AST). EDT commonly covers North America, Caribbean, while AST is mainly associated with North America, Caribbean.
⚠️ Note: 2026-07-05 is not a normal workday in one or both regions based on their configured calendar. The overlap below should be treated as a reference, not a guaranteed office-hours window.
✅ The most practical overlap on 2026-07-05 is usually 9:00 AM - 4:00 PM EDT, which corresponds to 10:00 AM - 5:00 PM AST. This window sits inside the typical EDT workday (9:00 AM - 6:00 PM) and the AST workday (9:00 AM - 5:00 PM).
- DST Safety: EDT or AST may shift during Daylight Saving Time. Always confirm the converted time for your specific date.
- New York Stock Exchange (NYSE): 09:30-16:00 local time in New York.
🔥 Popular EDT & AST Converters
Frequently searched time zone conversions related to your search.
Related Time Converters
Explore nearby time zone offsets and reverse conversions related to EDT and AST.
Frequently Asked Questions
What is the time difference between EDT and AST?
During standard time, Atlantic Standard Time is 0 hours ahead of Eastern Daylight Time.
When does EDT start and end?
EDT begins on the second Sunday in March at 02:00 local time, when clocks spring forward one hour from EST (UTC-5) to EDT (UTC-4). It ends on the first Sunday in November at 02:00 local time, when clocks fall back to EST. In 2026, EDT runs from March 8 through November 1.
Is EDT the same as EST?
EDT and EST are two phases of the same Eastern Time zone, not two separate zones. EST (Eastern Standard Time) is the winter offset at UTC-5, observed from early November through mid-March. EDT (Eastern Daylight Time) is the summer offset at UTC-4, active during Daylight Saving Time — meaning New York and Toronto run one hour ahead of their winter clock for roughly eight months of every year.
Does the Caribbean observe Daylight Saving Time?
The vast majority of Caribbean nations and territories — including Puerto Rico, the Dominican Republic, the US Virgin Islands, Trinidad and Tobago, and Barbados — do not observe Daylight Saving Time and remain on AST (UTC-4) year-round. This means these territories share the same clock as Halifax only during the Atlantic Standard Time window in winter, diverging by one hour once Canada and Bermuda advance to ADT each spring.
What is the difference between AST and ADT?
AST (Atlantic Standard Time) is the standard winter offset at UTC-4:00, observed from the first Sunday in November through the second Sunday in March across all AST regions. ADT (Atlantic Daylight Time) is the summer offset at UTC-3:00, applied by Eastern Canadian provinces and Bermuda when they advance their clocks by one hour during Daylight Saving Time.