Convert ADT to HDT Time
Free online converter with current times, time difference, and conversion table between ADT and HDT time zones.
Current time in ADT: Loading...
Current time in HDT: Loading...
Time difference: -6 hours
ADT to HDT Conversion Table
This table shows common ADT times converted to HDT time:
About ADT and HDT Time Zones
ADT Time Zone
Full Name: Atlantic Daylight Time
UTC Offset: UTC-3
Current Time: Loading...
Daylight saving time in the Atlantic Time Zone.
Used in: Canada, Bermuda
HDT Time Zone
Full Name: Hawaii Daylight Time
UTC Offset: UTC-9
Current Time: Loading...
Historically used daylight saving time in Hawaii.
Used in: USA (Hawaii - historical)
How to Convert ADT to HDT
Enter ADT Time
Enter the ADT time you want to convert using the time picker or by typing directly in 24-hour format.
Click Convert
Click the "Convert Time" button to perform the conversion from ADT to HDT.
View Result
The equivalent HDT time will be displayed, along with the time difference between the two zones.
Use Conversion Table
For quick reference, you can also use the conversion table below that shows common ADT times converted to HDT.
Common Uses for ADT to HDT Conversion
International Business
Schedule meetings and calls between locations in Canada and USA (Hawaii - historical) time zones.
Travel Planning
Calculate arrival times and plan activities when traveling between Canada and USA (Hawaii - historical).
Event Scheduling
Convert event times for international broadcasts, webinars, or sports events between these regions.
Keeping in Touch
Find the best times to call friends, family, or colleagues across these time zones.
Frequently Asked Questions
The time difference between ADT and HDT is -6 hours. This means that when it's noon (12:00 PM) in ADT, it's 6:00 AM in HDT.
To convert ADT to HDT time, subtract 6 hours from the ADT time. You can use our converter at the top of this page for instant and accurate conversions.
ADT observes DST. HDT does not observe DST.
Partial overlap in business hours.
Our converter uses standard time zone offsets. For the most accurate conversions during DST transition periods, please verify the exact dates when DST begins or ends in the relevant regions, as these can vary by year and location.