BJT to AST Converter & Meeting Planner
Quick answer: 9:00 AM BJT = 9:00 PM AST (fixed +08:00 standard offset — not DST-adjusted). Use the interactive converter below for DST-aware local-time scheduling.
Planning a call or meeting between Beijing Time (BJT) and Atlantic Standard Time (AST)? You need to account for the standard time difference. Atlantic Standard Time is normally 12 hours behind Beijing Time. Whether you are coordinating between teams in Beijing and Shanghai 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 BJT = 12:00 PM AST. The full 24-hour BJT to AST table below uses fixed standard offsets for exact abbreviation searches.
Example: 3:00 PM BJT = 3:00 AM AST.
| BJT Time | AST Time |
|---|---|
| 12:00 AM (00:00) | 12:00 PM (12:00)-1 day |
| 1:00 AM (01:00) | 1:00 PM (13:00)-1 day |
| 2:00 AM (02:00) | 2:00 PM (14:00)-1 day |
| 3:00 AM (03:00) | 3:00 PM (15:00)-1 day |
| 4:00 AM (04:00) | 4:00 PM (16:00)-1 day |
| 5:00 AM (05:00) | 5:00 PM (17:00)-1 day |
| 6:00 AM (06:00) | 6:00 PM (18:00)-1 day |
| 7:00 AM (07:00) | 7:00 PM (19:00)-1 day |
| 8:00 AM (08:00) | 8:00 PM (20:00)-1 day |
| 9:00 AM (09:00) | 9:00 PM (21:00)-1 day |
| 10:00 AM (10:00) | 10:00 PM (22:00)-1 day |
| 11:00 AM (11:00) | 11:00 PM (23:00)-1 day |
| 12:00 PM (12:00) | 12:00 AM (00:00) |
| 1:00 PM (13:00) | 1:00 AM (01:00) |
| 2:00 PM (14:00) | 2:00 AM (02:00) |
| 3:00 PM (15:00) | 3:00 AM (03:00) |
| 4:00 PM (16:00) | 4:00 AM (04:00) |
| 5:00 PM (17:00) | 5:00 AM (05:00) |
| 6:00 PM (18:00) | 6:00 AM (06:00) |
| 7:00 PM (19:00) | 7:00 AM (07:00) |
| 8:00 PM (20:00) | 8:00 AM (08:00) |
| 9:00 PM (21:00) | 9:00 AM (09:00) |
| 10:00 PM (22:00) | 10:00 AM (10:00) |
| 11:00 PM (23:00) | 11:00 AM (11:00) |
Best time to call Halifax from Beijing
For most work calls, compare the normal business day in Beijing (BJT) with the business day in Halifax (AST). BJT commonly covers East Asia, 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.
⚠️ There is no clean same-day business-hours overlap on 2026-07-05. A practical compromise is around 8:00 PM BJT, which reaches 9:00 AM AST near the start of their workday.
- DST Safety: BJT or AST may shift during Daylight Saving Time. Always confirm the converted time for your specific date.
- Shanghai Stock Exchange (SSE): 09:30-15:00 local time in Shanghai.
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Frequently Asked Questions
What is the time difference between BJT and AST?
During standard time, Atlantic Standard Time is 12 hours behind Beijing Time.
Does China observe Daylight Saving Time?
Mainland China abolished Daylight Saving Time in 1991 and has remained permanently fixed at UTC+8:00 ever since, with no seasonal clock adjustment at any point in the year. This means the offset between Beijing or Shanghai and any DST-observing country shifts by one hour twice annually when those countries change their clocks — but BJT itself never moves.
How many time zones are there in China?
Despite spanning a geographical width that would naturally encompass five separate time zones — from the eastern coast at roughly UTC+8 to the western reaches of Xinjiang near UTC+6 or even UTC+5 — China officially mandates a single unified time zone, Beijing Time (BJT) at UTC+8:00, across the entire country. This policy has been in place since 1949 and applies to all 34 provincial-level administrative regions without exception.
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.