Time difference
Adelaide to Boston Time Difference
Boston is 13 hours and 30 minutes behind Adelaide — when it's 12:00 PM in Adelaide, it's 10:30 PM the previous day in Boston. (Adelaide (Australia/Adelaide, ACST); Boston (America/New_York, EDT).) Below: live local times, the best hours for a call, a full conversion table, and exact daylight-saving dates.
Boston is 13 hours and 30 minutes behind Adelaide. Standard 9 AM–5 PM business hours in Adelaide and Boston do not overlap, so a live call needs one side outside normal hours. Clocks change on October 4, 2026, which briefly shifts the gap between Adelaide and Boston — the converter on this page always reflects the correct offset for the date you pick.
- When it's 9:00 AM in Adelaide, it's 7:30 PM the previous day in Boston.
- When it's 9:00 AM in Boston, it's 10:30 PM in Adelaide.
Boston is currently 13 hours and 30 minutes behind Adelaide.
Interactive converter
12:00PM
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Best times to meet
Standard 9 AM – 5 PM hours in Adelaide and Boston do not overlap. The least-bad options are an early start in one city or a late evening call in the other — for example a 7–8 AM meeting in Adelaide, or a 6–8 PM meeting in Boston.
Quick conversion table
| Adelaide | Boston |
|---|---|
| 12 AM | 10:30 AM (prev day) |
| 1 AM | 11:30 AM (prev day) |
| 2 AM | 12:30 PM (prev day) |
| 3 AM | 1:30 PM (prev day) |
| 4 AM | 2:30 PM (prev day) |
| 5 AM | 3:30 PM (prev day) |
| 6 AM | 4:30 PM (prev day) |
| 7 AM | 5:30 PM (prev day) |
| 8 AM | 6:30 PM (prev day) |
| 9 AM | 7:30 PM (prev day) |
| 10 AM | 8:30 PM (prev day) |
| 11 AM | 9:30 PM (prev day) |
| 12 PM | 10:30 PM (prev day) |
| 1 PM | 11:30 PM (prev day) |
| 2 PM | 12:30 AM |
| 3 PM | 1:30 AM |
| 4 PM | 2:30 AM |
| 5 PM | 3:30 AM |
| 6 PM | 4:30 AM |
| 7 PM | 5:30 AM |
| 8 PM | 6:30 AM |
| 9 PM | 7:30 AM |
| 10 PM | 8:30 AM |
| 11 PM | 9:30 AM |
Daylight saving
On October 4, 2026, Adelaide shifts for daylight saving. After that, Boston will be 14 hours and 30 minutes behind Adelaide (currently 13 hours and 30 minutes behind Adelaide). The converter and the tables above always reflect the correct offset for the date you pick.
- Adelaide is not currently observing daylight saving time (standard time is in effect).
- Boston is currently observing daylight saving time.
Frequently asked questions
- Is Boston ahead of or behind Adelaide?
- Boston is 13 hours and 30 minutes behind Adelaide.
- How many hours behind Adelaide is Boston?
- Boston is 13 hours and 30 minutes behind Adelaide.
- What time is 9 AM in Adelaide in Boston?
- 9:00 AM in Adelaide is 7:30 PM the previous day in Boston.
- What time is noon in Adelaide in Boston?
- 12:00 PM in Adelaide is 10:30 PM the previous day in Boston.
- What time is 5 PM in Adelaide in Boston?
- 5:00 PM in Adelaide is 3:30 AM in Boston. Useful for end-of-day handoffs between the two offices.
- What time is 3 PM in Adelaide in Boston?
- 3:00 PM in Adelaide is 1:30 AM in Boston.
- Is Adelaide currently observing daylight saving time?
- Adelaide observes daylight saving time seasonally, but is not currently on DST (standard time is in effect).
- Is Boston currently observing daylight saving time?
- Boston is currently observing daylight saving time (summer time).
- Do Adelaide and Boston observe daylight saving?
- On October 4, 2026, Adelaide shifts for daylight saving. After that, Boston will be 14 hours and 30 minutes behind Adelaide (currently 13 hours and 30 minutes behind Adelaide). The converter and the tables above always reflect the correct offset for the date you pick.
- When is the best time to call Boston from Adelaide?
- Adelaide and Boston business hours don't overlap. The closest options are early mornings in Adelaide or late evenings, when one side stretches outside 9–5.
- When is the best time to call Adelaide from Boston?
- Boston and Adelaide business hours don't overlap. The closest options are early mornings in Boston or late evenings, when one side stretches outside 9–5.
- Adelaide (ACST) to Boston (EDT) — how do I convert quickly?
- Subtract 13 hours and 30 minutes from Adelaide local time to get Boston local time. Or use the converter at the top of this page — it stays accurate through daylight-saving changes automatically.
Other conversions
- Adelaide to New York
- Adelaide to London
- Adelaide to Tokyo
- Adelaide to Dubai
- Adelaide to Singapore
- Adelaide to Los Angeles
- Adelaide to Sydney
- Adelaide to Paris
- Adelaide to Mumbai
- Adelaide to Hong Kong