HST to EDT Converter & Meeting Planner
Quick answer: 9:00 AM HST = 3:00 PM EDT (fixed -10:00 standard offset — not DST-adjusted). Use the interactive converter below for DST-aware local-time scheduling.
Planning a call or meeting between Hawaii-Aleutian Standard Time (HST) and Eastern Daylight Time (EDT)? You need to account for the standard time difference. Eastern Daylight Time is normally 6 hours ahead of Hawaii-Aleutian Standard Time. Whether you are coordinating between teams in Honolulu and Hilo and New York and Washington D.C., 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 HST = 6:00 AM EDT. The full 24-hour HST to EDT table below uses fixed standard offsets for exact abbreviation searches.
Example: 3:00 PM HST = 9:00 PM EDT.
| HST Time | EDT Time |
|---|---|
| 12:00 AM (00:00) | 6:00 AM (06:00) |
| 1:00 AM (01:00) | 7:00 AM (07:00) |
| 2:00 AM (02:00) | 8:00 AM (08:00) |
| 3:00 AM (03:00) | 9:00 AM (09:00) |
| 4:00 AM (04:00) | 10:00 AM (10:00) |
| 5:00 AM (05:00) | 11:00 AM (11:00) |
| 6:00 AM (06:00) | 12:00 PM (12:00) |
| 7:00 AM (07:00) | 1:00 PM (13:00) |
| 8:00 AM (08:00) | 2:00 PM (14:00) |
| 9:00 AM (09:00) | 3:00 PM (15:00) |
| 10:00 AM (10:00) | 4:00 PM (16:00) |
| 11:00 AM (11:00) | 5:00 PM (17:00) |
| 12:00 PM (12:00) | 6:00 PM (18:00) |
| 1:00 PM (13:00) | 7:00 PM (19:00) |
| 2:00 PM (14:00) | 8:00 PM (20:00) |
| 3:00 PM (15:00) | 9:00 PM (21:00) |
| 4:00 PM (16:00) | 10:00 PM (22:00) |
| 5:00 PM (17:00) | 11:00 PM (23:00) |
| 6:00 PM (18:00) | 12:00 AM (00:00)+1 day |
| 7:00 PM (19:00) | 1:00 AM (01:00)+1 day |
| 8:00 PM (20:00) | 2:00 AM (02:00)+1 day |
| 9:00 PM (21:00) | 3:00 AM (03:00)+1 day |
| 10:00 PM (22:00) | 4:00 AM (04:00)+1 day |
| 11:00 PM (23:00) | 5:00 AM (05:00)+1 day |
Best time to call New York from Honolulu
For most work calls, compare the normal business day in Honolulu (HST) with the business day in New York (EDT). HST commonly covers Pacific Ocean, North America, while EDT 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.
✅ The most practical overlap on 2026-07-05 is usually 9:00 AM - 12:00 PM HST, which corresponds to 3:00 PM - 6:00 PM EDT. This window sits inside the typical HST workday (9:00 AM - 5:00 PM) and the EDT workday (9:00 AM - 6:00 PM).
- DST Safety: HST or EDT may shift during Daylight Saving Time. Always confirm the converted time for your specific date.
- New York Stock Exchange (NYSE): 09:30-16:00 local time in New York.
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Frequently Asked Questions
What is the time difference between HST and EDT?
During standard time, Eastern Daylight Time is 6 hours ahead of Hawaii-Aleutian Standard Time.
Does Hawaii observe Daylight Saving Time?
Hawaii does not observe Daylight Saving Time and has not done so since 1947, remaining fixed at UTC-10:00 year-round. At roughly 20° North latitude, Hawaii's daylight hours vary by only about 1.5 hours between the summer and winter solstices — far too little to justify the disruption of a seasonal clock change.
Why is it called Hawaii-Aleutian time?
The name combines two geographically distant US territories that share the same UTC-10:00 standard offset: the Hawaiian Islands in the central Pacific and the westernmost Aleutian Islands of Alaska, which extend past the 180° meridian into the Eastern Hemisphere. Despite sharing a base offset, they behave differently — Hawaii observes no DST, while the Aleutian communities such as Adak do advance to HDT (UTC-9) each summer.
When does EDT start and end?
EDT begins on the second Sunday in March at 02:00 local time, when clocks spring forward one hour from EST (UTC-5) to EDT (UTC-4). It ends on the first Sunday in November at 02:00 local time, when clocks fall back to EST. In 2026, EDT runs from March 8 through November 1.
Is EDT the same as EST?
EDT and EST are two phases of the same Eastern Time zone, not two separate zones. EST (Eastern Standard Time) is the winter offset at UTC-5, observed from early November through mid-March. EDT (Eastern Daylight Time) is the summer offset at UTC-4, active during Daylight Saving Time — meaning New York and Toronto run one hour ahead of their winter clock for roughly eight months of every year.