Hawaii Time to Canada Atlantic Time
Convert times between Hawaii Time (HST, UTC-10:00) and Canada Atlantic Time (AST, UTC-4:00). Canada Atlantic Time is 6 hours ahead of Hawaii Time in standard time. During daylight saving time this difference changes to 7 hours.
UTC-10:00→UTC-4:00 / -3:00
Live timezone converterUTC Offset Reference
| Timezone | Abbreviation | Standard offset | DST offset | Country |
|---|---|---|---|---|
| Hawaii Time | HST | UTC-10:00 | — | United States |
| Canada Atlantic Time | AST / ADT | UTC-4:00 | UTC-3:00 | Canada |
* DST offset applies during summer months. Exact transition dates vary by year.
Standard Time Conversion (HST → AST)
| Hawaii Time | Canada Atlantic Time |
|---|---|
| 12:00 AM HST | 6:00 AM AST |
| 6:00 AM HST | 12:00 PM AST |
| 9:00 AM HST | 3:00 PM AST |
| 12:00 PM HST | 6:00 PM AST |
| 3:00 PM HST | 9:00 PM AST |
| 6:00 PM HST | 12:00 AM (next day) AST |
| 9:00 PM HST | 3:00 AM (next day) AST |
Summer (DST) Conversion (HST → ADT)
| Hawaii Time (summer) | Canada Atlantic Time (summer) |
|---|---|
| 12:00 AM HST | 7:00 AM ADT |
| 6:00 AM HST | 1:00 PM ADT |
| 9:00 AM HST | 4:00 PM ADT |
| 12:00 PM HST | 7:00 PM ADT |
| 3:00 PM HST | 10:00 PM ADT |
| 6:00 PM HST | 1:00 AM (next day) ADT |
| 9:00 PM HST | 4:00 AM (next day) ADT |
Daylight Saving Time (DST) Notes
- Canada Atlantic Time observes DST. Clocks advance 1 hour to ADT (UTC-3:00) roughly from month 3 to 11.
- The offset difference shifts between 6h (standard) and 7h (DST season). Always verify the current offset using the live converter below.
Frequently Asked Questions
How do I convert HST to AST?
Add 6 hours to the HST time to get AST. For example, 9:00 AM HST = 3:00 PM AST.
What is the current UTC offset for Hawaii Time?
Hawaii Time is always UTC-10:00 (HST) — it does not observe DST.
Is Canada Atlantic Time ahead or behind Hawaii Time?
Canada Atlantic Time is 6 hours ahead of Hawaii Time in standard time.
When is a good time to schedule a meeting between HST and AST?
A good overlap window is around 9:00 AM HST / 3:00 PM AST, which falls within business hours for both timezones.
Related Timezone Conversions
Hawaii Time → US Eastern TimeHST / ESTHawaii Time → US Central TimeHST / CSTHawaii Time → US Mountain TimeHST / MSTHawaii Time → US Pacific TimeHST / PSTHawaii Time → US Alaska TimeHST / AKSTHawaii Time → Greenwich Mean TimeHST / GMTHawaii Time → India Standard TimeHST / ISTHawaii Time → China Standard TimeHST / CST
Need the exact current time?
Use the live ToolsHub timezone converter to see current times, DST status, and schedule across time zones.