Convert Korea Standard Time to Atlantic Standard Time
Instantly convert Korea Standard Time (KST) to Atlantic Standard Time (AST) with our free online calculator.
Korea Standard Time
02:20:52 PM
Wed, Jun 24 (KST)
Atlantic Standard Time
01:20:52 AM
Wed, Jun 24 (AST)
Convert a Specific Time
24-Hour Comparison
| KST | AST |
|---|---|
| 12:00 AM | 11:00 AM(-1d) |
| 1:00 AM | 12:00 PM(-1d) |
| 2:00 AM | 1:00 PM(-1d) |
| 3:00 AM | 2:00 PM(-1d) |
| 4:00 AM | 3:00 PM(-1d) |
| 5:00 AM | 4:00 PM(-1d) |
| 6:00 AM | 5:00 PM(-1d) |
| 7:00 AM | 6:00 PM(-1d) |
| 8:00 AM | 7:00 PM(-1d) |
| 9:00 AM | 8:00 PM(-1d) |
| 10:00 AM | 9:00 PM(-1d) |
| 11:00 AM | 10:00 PM(-1d) |
| 12:00 PM | 11:00 PM(-1d) |
| 1:00 PM | 12:00 AM |
| 2:00 PM | 1:00 AM |
| 3:00 PM | 2:00 AM |
| 4:00 PM | 3:00 AM |
| 5:00 PM | 4:00 AM |
| 6:00 PM | 5:00 AM |
| 7:00 PM | 6:00 AM |
| 8:00 PM | 7:00 AM |
| 9:00 PM | 8:00 AM |
| 10:00 PM | 9:00 AM |
| 11:00 PM | 10:00 AM |
How to Convert Korea Standard Time to Atlantic Standard Time
Formula
To convert Korea Standard Time (KST) to Atlantic Standard Time (AST): Convert KST to AST
About Korea Standard Time (KST)
Korea Standard Time (KST, IANA: Asia/Seoul) is the civil time of both the Republic of Korea (South Korea) and the Democratic People's Republic of Korea (North Korea — since May 2018 when North Korea reverted to KST from its briefly used Pyongyang Time UTC+8:30 of 2015-2018), set at UTC+9:00 year-round (no DST). South Korea observed Daylight Saving Time briefly in 1948-1951 and again 1987-1988 during the Seoul Olympics (to facilitate evening TV broadcasts to North America), but discontinued it both times. KST is identical in offset to Japan Standard Time (JST), Yakutsk Time, Western Indonesian Time WIT (eastern Indonesia), and Palau Time (PWT) — creating a 'business-friendly' Northeast Asia zone of synchronized financial centers (Seoul-Tokyo). KST serves the Korean Peninsula's approximately 78 million residents (South Korea 52M + North Korea 26M). Major KST cities: Seoul (9.7M city, 25.7M metro — South Korean capital and the world's 5th-largest metro), Busan (3.3M — South Korea's 2nd-largest city + main port), Incheon (3M — Seoul Capital Area, location of Incheon International Airport ICN), Daegu (2.4M), Daejeon (1.5M), Pyongyang (3.2M — North Korean capital), Hamhung (770K — North Korea), Nampo (980K — North Korea). Affects: KRX (Korea Exchange) trading hours, K-pop industry music-release timing, Samsung + LG + Hyundai global headquarters operations.
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.