Convert Atlantic Standard Time to Pacific Daylight Time
Instantly convert Atlantic Standard Time (AST) to Pacific Daylight Time (PDT) with our free online calculator.
Atlantic Standard Time
01:20:59 AM
Wed, Jun 24 (AST)
Pacific Daylight Time
10:20:59 PM
Tue, Jun 23 (PDT)
Convert a Specific Time
24-Hour Comparison
| AST | PDT |
|---|---|
| 12:00 AM | 9:00 PM(-1d) |
| 1:00 AM | 10:00 PM(-1d) |
| 2:00 AM | 11:00 PM(-1d) |
| 3:00 AM | 12:00 AM |
| 4:00 AM | 1:00 AM |
| 5:00 AM | 2:00 AM |
| 6:00 AM | 3:00 AM |
| 7:00 AM | 4:00 AM |
| 8:00 AM | 5:00 AM |
| 9:00 AM | 6:00 AM |
| 10:00 AM | 7:00 AM |
| 11:00 AM | 8:00 AM |
| 12:00 PM | 9:00 AM |
| 1:00 PM | 10:00 AM |
| 2:00 PM | 11:00 AM |
| 3:00 PM | 12:00 PM |
| 4:00 PM | 1:00 PM |
| 5:00 PM | 2:00 PM |
| 6:00 PM | 3:00 PM |
| 7:00 PM | 4:00 PM |
| 8:00 PM | 5:00 PM |
| 9:00 PM | 6:00 PM |
| 10:00 PM | 7:00 PM |
| 11:00 PM | 8:00 PM |
How to Convert Atlantic Standard Time to Pacific Daylight Time
Formula
To convert Atlantic Standard Time (AST) to Pacific Daylight Time (PDT): Convert AST to PDT
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 Pacific Daylight Time (PDT)
Pacific Daylight Time (PDT, IANA: America/Los_Angeles during DST window) is the summer-time variant of PST, set at UTC-7:00 — observed from the second Sunday in March to the first Sunday in November per the Energy Policy Act of 2005, which extended the US DST window by ~4 weeks compared to the prior Uniform Time Act of 1966 schedule. PDT is the same offset as Mountain Standard Time (MST), creating a confusing situation where Arizona (which doesn't observe DST and stays on MST year-round) shares the same clock as California during summer months but is one hour behind during winter. PDT is used by ~50 million people in California, Oregon, Washington, Nevada, British Columbia, Yukon, and Baja California Norte. Affects: West-Coast NYSE/Nasdaq market open shifts to 06:30 PDT, professional sports West Coast game-time broadcasts to East Coast PDT prime time, and US Pacific Fleet operations from Naval Base San Diego.