HST to EDT
+6hHST
HSTSOURCEEDT
EDTGreen rows indicate typical business hours (9 AM - 5 PM)
HST and EDT on the World Map
The map below highlights the HST (Hawaii Standard Time) and EDT (Eastern Daylight Time) timezone regions across the globe.
HST – Hawaii Standard Time
UTC-10:00Hawaii Standard Time (HST) is the time zone for the Hawaiian Islands, 10 hours behind UTC.
- •Hawaii does not observe daylight saving time.
- •HST is 5 hours behind EST in winter and 6 hours behind EDT in summer.
- •Hawaii is one of only two US states that don't observe DST (the other is Arizona).
EDT – Eastern Daylight Time
UTC-04:00Eastern Daylight Time (EDT) is the daylight saving time observed in the Eastern Time Zone, 4 hours behind UTC.
- •EDT is observed from the second Sunday of March to the first Sunday of November.
- •During EDT, the US East Coast is only 4 hours behind London (instead of 5).
- •Not all EST locations switch to EDT – Panama and Jamaica stay on EST year-round.
Understanding the +6h Gap: HST vs EDT
HST runs on Hawaii Standard Time (HST) at UTC-10:00. EDT runs on Eastern Daylight Time (EDT) at UTC-04:00. That puts HST 6 hours ahead of EDT — a difference of +6h at the current offsets.
In practice, when it is 9:00 AM in HST it is 3:00 PM in EDT. Midnight in HST is 6:00 AM in EDT. Neither zone observes daylight saving time, so the offset between them stays constant all year.
HST to EDT time conversion table
| HST (HST) | EDT (EDT) | Day |
|---|---|---|
| 12:00 AM | 6:00 AM | same day |
| 6:00 AM | 12:00 PM | same day |
| 7:00 AM | 1:00 PM | same day |
| 8:00 AM | 2:00 PM | same day |
| 9:00 AM | 3:00 PM | same day |
| 12:00 PM | 6:00 PM | same day |
| 3:00 PM | 9:00 PM | same day |
| 5:00 PM | 11:00 PM | same day |
| 6:00 PM | 12:00 AM | next day |
| 9:00 PM | 3:00 AM | next day |
Why people convert HST to EDT time
- Scheduling a call from HST to EDT: a 10:00 AM start in HST lands at 4:00 PM in EDT, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both HST and EDT are inside the 9-to-5 working day between 9:00 AM and 11:00 AM HST time (3:00 PM–5:00 PM EDT). That is roughly 2 hours of usable overlap.
- Watching a live event or market open: HST viewers need 3:00 PM in EDT to catch a 9:00 AM start there, and 6:00 PM if the event is anchored to HST.
- Always state the zone abbreviation, not just the hour. "3:00 PM HST" is unambiguous; "3 PM" across a +6h gap is not.
- Block 9:00 AM–11:00 AM HST as the recurring meeting window if you work primarily from HST and need EDT colleagues present.
About HST (Hawaii Standard Time)
Hawaii Standard Time (HST) is used in the state of Hawaii and does not observe daylight saving time. This makes HST one of the most consistent time zones in the US. The Hawaiian Islands are among the last places on Earth to see a new calendar day.
About EDT (Eastern Daylight Time)
Eastern Daylight Time (EDT) is used during the summer months (second Sunday of March to the first Sunday of November) in the Eastern Time Zone. During EDT, clocks are advanced by one hour to take advantage of longer daylight hours. Not all locations in the Eastern Time Zone observe DST – Panama, Jamaica, and most of the Caribbean remain on EST year-round.
Best time to call between HST and EDT
Both HST and EDT sit inside the 9 AM – 5 PM working day between 9:00 AM–11:00 AM HST, which is 3:00 PM–5:00 PM EDT. That gives roughly 2 hours of shared time — the safest window for a live call or meeting.
Business hours overlap
HST and EDT overlap for about 2 hours during the working day — enough for meetings if you avoid the edges of the window.
HST is 6 hours ahead of EDT (HST UTC-10:00 → EDT UTC-04:00). The shared working window is 9:00 AM–11:00 AM HST. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
HST
Does not observe DST
EDT
☀ Currently in DST
Standard: UTC-05:00 · DST: UTC-04:00
Clocks fall back on Sun, Nov 1, 2026
Learn More About Time
Dive deeper into the fascinating world of timekeeping, time zones, and how they shape our global society:
Frequently Asked Questions
What is the time difference between HST and EDT?
HST (HST, UTC-10:00) is 6 hours ahead of EDT (EDT, UTC-04:00). The gap is currently +6h.
How do I convert HST time to EDT time?
Add +6h to HST local time. For example, 9:00 AM in HST is 3:00 PM in EDT.
What time is it in EDT right now?
EDT uses EDT at UTC-04:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +6h offset from HST.
What is the best time to call EDT from HST?
Call between 9:00 AM and 11:00 AM HST — that maps to 3:00 PM–5:00 PM EDT and keeps both parties inside the working day.
Which is ahead, HST or EDT?
HST is 6 hours ahead of EDT. When it is 12:00 PM in HST it is 6:00 PM in EDT.
Does daylight saving time affect the HST–EDT difference?
Neither zone observes daylight saving time, so the +6h offset between HST and EDT is fixed all year.
Which other cities share HST's time zone?
HST also covers Honolulu, Hilo, Kailua, Pearl City, Kapolei.
Which countries use HST, HST's zone?
HST is used in United States (Hawaii).
Is there a day difference between HST and EDT?
Not normally. The +6h gap only pushes the date over for late-evening times.
What is the time difference between HST and EDT?
EDT is +6h from HST.
What timezone is HST in?
HST operates on its local timezone.
What timezone is EDT in?
EDT operates on its local timezone.
Which countries use HST (Hawaii Standard Time)?
HST is used in United States (Hawaii).
Does HST observe daylight saving time?
No, HST does not observe daylight saving time and remains at UTC-10:00 year-round.
What are some interesting facts about HST?
Hawaii does not observe daylight saving time. HST is 5 hours behind EST in winter and 6 hours behind EDT in summer.
Which cities are in the EDT timezone?
Major cities in the EDT timezone include New York City, Washington D.C., Toronto, Miami, Philadelphia, Atlanta, Boston, Montreal.
What is the UTC offset for EDT?
Eastern Daylight Time (EDT) is at UTC-04:00. During daylight saving time, it shifts to EST.
What should I know about the EDT timezone?
EDT is observed from the second Sunday of March to the first Sunday of November. During EDT, the US East Coast is only 4 hours behind London (instead of 5).
When is it midnight in HST, what time is it in EDT?
When it is 12:00 AM (midnight) in HST (HST), it is +6h later in EDT (EDT).
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See every conversion from HST →·See every conversion from EDT →