Convert Atlantic Standard Time to Eastern Standard Time
Instantly convert Atlantic Standard Time (AST) to Eastern Standard Time (EST) with our free online calculator.
Atlantic Standard Time
01:20:48 AM
Wed, Jun 24 (AST)
Eastern Standard Time
12:20:48 AM
Wed, Jun 24 (EST)
Convert a Specific Time
24-Hour Comparison
| AST | EST |
|---|---|
| 12:00 AM | 11:00 PM(-1d) |
| 1:00 AM | 12:00 AM |
| 2:00 AM | 1:00 AM |
| 3:00 AM | 2:00 AM |
| 4:00 AM | 3:00 AM |
| 5:00 AM | 4:00 AM |
| 6:00 AM | 5:00 AM |
| 7:00 AM | 6:00 AM |
| 8:00 AM | 7:00 AM |
| 9:00 AM | 8:00 AM |
| 10:00 AM | 9:00 AM |
| 11:00 AM | 10:00 AM |
| 12:00 PM | 11:00 AM |
| 1:00 PM | 12:00 PM |
| 2:00 PM | 1:00 PM |
| 3:00 PM | 2:00 PM |
| 4:00 PM | 3:00 PM |
| 5:00 PM | 4:00 PM |
| 6:00 PM | 5:00 PM |
| 7:00 PM | 6:00 PM |
| 8:00 PM | 7:00 PM |
| 9:00 PM | 8:00 PM |
| 10:00 PM | 9:00 PM |
| 11:00 PM | 10:00 PM |
How to Convert Atlantic Standard Time to Eastern Standard Time
Formula
To convert Atlantic Standard Time (AST) to Eastern Standard Time (EST): Convert AST to EST
About Atlantic Standard Time (AST)
Atlantic Standard Time (AST, IANA: America/Halifax, America/Puerto_Rico) is the time zone for the Canadian Maritime provinces and most of the Caribbean, set at UTC-4:00. AST is observed in: Nova Scotia, New Brunswick, Prince Edward Island, Labrador (partially), Newfoundland's Labrador portion, eastern Quebec, Puerto Rico, US Virgin Islands, Bermuda, Anguilla, Antigua, Aruba, Barbados, British Virgin Islands, Curaçao, Dominica, Grenada, Guadeloupe, Martinique, Saint Lucia, Saint Vincent, Trinidad and Tobago, and Venezuela (since 2007). Canadian Maritime provinces observe AST in winter and switch to ADT = UTC-3:00 in summer per the Energy Policy Act-aligned Canadian schedule. The Caribbean territories (Puerto Rico, USVI, Bermuda) and US territories observe AST year-round without DST per their territorial governments. AST is the same offset as EDT (Eastern Daylight Time) during US summer months, so Halifax and New York are on the same clock in summer but Halifax is one hour ahead in winter.
About Eastern Standard Time (EST)
Eastern Standard Time (EST, IANA: America/New_York, America/Toronto) is the time zone for the US Eastern Seaboard and Canadian eastern provinces, set at UTC-5:00. EST is the most economically and politically significant US time zone, serving the NYC-Washington DC-Boston-Atlanta-Miami corridor of ~150 million people across the entire US Eastern region (New York, Pennsylvania, Massachusetts, Connecticut, Rhode Island, Vermont, New Hampshire, Maine, New Jersey, Delaware, Maryland, Virginia, West Virginia, North Carolina, South Carolina, Georgia, Florida except panhandle, Ohio, Kentucky eastern, Tennessee eastern, Indiana most, Michigan most), eastern Canada (Quebec, Ontario), and the Caribbean (Bahamas, Cuba, Jamaica, Haiti, Panama since 1908). EST observes DST per Energy Policy Act 2005 (switching to EDT = UTC-4:00 from March to November). NYSE official market hours 09:30-16:00 EST/EDT, Wall Street financial reporting, US Federal Government Washington DC working hours, and US Capitol legislative sessions all reference EST/EDT. The historical 'Big Three' US TV-network prime-time was 8-11 PM EST.