Convert China Standard Time to Atlantic Standard Time
Instantly convert China Standard Time (CST) to Atlantic Standard Time (AST) with our free online calculator.
China Standard Time
01:20:56 PM
Wed, Jun 24 (CST)
Atlantic Standard Time
01:20:56 AM
Wed, Jun 24 (AST)
Convert a Specific Time
24-Hour Comparison
| CST | AST |
|---|---|
| 12:00 AM | 12:00 PM(-1d) |
| 1:00 AM | 1:00 PM(-1d) |
| 2:00 AM | 2:00 PM(-1d) |
| 3:00 AM | 3:00 PM(-1d) |
| 4:00 AM | 4:00 PM(-1d) |
| 5:00 AM | 5:00 PM(-1d) |
| 6:00 AM | 6:00 PM(-1d) |
| 7:00 AM | 7:00 PM(-1d) |
| 8:00 AM | 8:00 PM(-1d) |
| 9:00 AM | 9:00 PM(-1d) |
| 10:00 AM | 10:00 PM(-1d) |
| 11:00 AM | 11:00 PM(-1d) |
| 12:00 PM | 12:00 AM |
| 1:00 PM | 1:00 AM |
| 2:00 PM | 2:00 AM |
| 3:00 PM | 3:00 AM |
| 4:00 PM | 4:00 AM |
| 5:00 PM | 5:00 AM |
| 6:00 PM | 6:00 AM |
| 7:00 PM | 7:00 AM |
| 8:00 PM | 8:00 AM |
| 9:00 PM | 9:00 AM |
| 10:00 PM | 10:00 AM |
| 11:00 PM | 11:00 AM |
How to Convert China Standard Time to Atlantic Standard Time
Formula
To convert China Standard Time (CST) to Atlantic Standard Time (AST): Convert CST to AST
About China Standard Time (CST)
China Standard Time (CST, IANA: Asia/Shanghai) is the unified civil time of the People's Republic of China, set at UTC+8:00 year-round (no DST). Despite China's vast east-west extent (~5,200 km from Xinjiang's western border at 73°E to Heilongjiang's eastern border at 135°E — 62° of longitude or ~4 hours of solar time), the entire country uses a single time zone since 1949 (consolidated from 5 separate zones used during the Republic of China era). This means Kashgar Xinjiang sees solar noon at approximately 14:00 CST in summer, while Shanghai sees solar noon at approximately 11:50 CST — a stark practical discrepancy. Hong Kong Time (HKT) and Macau Time (MOT) are identical at UTC+8 but use different IANA identifiers for historical reasons. CST serves approximately 1.42 billion people. CST is identical in offset to Singapore Time (SGT), Malaysia Time (MYT), Philippine Time (PHT), Australian Western Standard Time (AWST), Hong Kong Time (HKT). Major CST cities: Shanghai (24M), Beijing (21.5M), Chongqing (32M), Guangzhou (15M), Shenzhen (12.5M), Chengdu (16.3M), Tianjin (13.7M), Wuhan (11M), Xi'an (13M), Hangzhou (11.9M). Affects: SSE + SZSE stock exchanges, Beijing Central Government working hours.
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.