Convert HDT to ADT Time
Free online converter with current times, time difference, and conversion table between HDT and ADT time zones.
Current time in HDT: Loading...
Current time in ADT: Loading...
Time difference: +6 hours
HDT to ADT Conversion Table
This table shows common HDT times converted to ADT time:
About HDT and ADT Time Zones
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)
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
How to Convert HDT to ADT
Enter HDT Time
Enter the HDT 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 HDT to ADT.
View Result
The equivalent ADT 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 HDT times converted to ADT.
Common Uses for HDT to ADT Conversion
International Business
Schedule meetings and calls between locations in USA (Hawaii - historical) and Canada time zones.
Travel Planning
Calculate arrival times and plan activities when traveling between USA (Hawaii - historical) and Canada.
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 HDT and ADT is +6 hours. This means that when it's noon (12:00 PM) in HDT, it's 6:00 PM in ADT.
To convert HDT to ADT time, add 6 hours to the HDT time. You can use our converter at the top of this page for instant and accurate conversions.
HDT does not observe DST. ADT observes 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.