HST to NST
+6h 30mHST
HSTSOURCENST
NSTGreen rows indicate typical business hours (9 AM - 5 PM)
HST and NST on the World Map
The map below highlights the HST (Hawaii Standard Time) and NST (Newfoundland Standard 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).
NST – Newfoundland Standard Time
UTC-03:30Newfoundland Standard Time (NST) is a unique half-hour offset time zone in Canada, 3.5 hours behind UTC.
- •NST is one of only a few half-hour offset time zones in the world.
- •Newfoundland joined Canada in 1949 and kept its unique time zone.
- •St. John's is the easternmost city in North America.
Time Conversion Guide: HST to NST
HST runs on Hawaii Standard Time (HST) at UTC-10:00. NST runs on Newfoundland Standard Time (NST) at UTC-03:30. That puts HST 6 hours 30 minutes ahead of NST — a difference of +6h 30m at the current offsets.
In practice, when it is 9:00 AM in HST it is 3:30 PM in NST. Midnight in HST is 6:30 AM in NST. Neither zone observes daylight saving time, so the offset between them stays constant all year.
HST to NST time conversion table
| HST (HST) | NST (NST) | Day |
|---|---|---|
| 12:00 AM | 6:30 AM | same day |
| 6:00 AM | 12:30 PM | same day |
| 7:00 AM | 1:30 PM | same day |
| 8:00 AM | 2:30 PM | same day |
| 9:00 AM | 3:30 PM | same day |
| 12:00 PM | 6:30 PM | same day |
| 3:00 PM | 9:30 PM | same day |
| 5:00 PM | 11:30 PM | same day |
| 6:00 PM | 12:30 AM | next day |
| 9:00 PM | 3:30 AM | next day |
Why people convert HST to NST time
- Scheduling a call from HST to NST: a 10:00 AM start in HST lands at 4:30 PM in NST, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both HST and NST are inside the 9-to-5 working day between 9:00 AM and 10:30 AM HST time (3:30 PM–5:00 PM NST). That is roughly 1 hours 30 minutes of usable overlap.
- Keeping family and friends in sync: knowing that 8:00 PM in HST is 2:30 AM in NST makes it easy to avoid calling at 3 AM.
- Always state the zone abbreviation, not just the hour. "3:00 PM HST" is unambiguous; "3 PM" across a +6h 30m gap is not.
- Block 9:00 AM–10:30 AM HST as the recurring meeting window if you work primarily from HST and need NST 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 NST (Newfoundland Standard Time)
Newfoundland Standard Time (NST) is one of the few half-hour offset time zones in the world. It covers the island of Newfoundland in Canada and is 30 minutes ahead of Atlantic Standard Time. This unique offset exists because Newfoundland was an independent country until 1949.
Best time to call between HST and NST
Both HST and NST sit inside the 9 AM – 5 PM working day between 9:00 AM–10:30 AM HST, which is 3:30 PM–5:00 PM NST. That gives roughly 1 hours and 30 minutes of shared time — the safest window for a live call or meeting.
Business hours overlap
HST and NST overlap for only 90 minutes (9:00 AM–10:30 AM HST), so meetings have to be booked precisely.
HST is 6 hours 30 minutes ahead of NST (HST UTC-10:00 → NST UTC-03:30). The shared working window is 9:00 AM–10:30 AM HST. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
HST
Does not observe DST
NST
☀ Currently in DST
Standard: UTC-03:30 · DST: UTC-02:30
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 NST?
HST (HST, UTC-10:00) is 6 hours 30 minutes ahead of NST (NST, UTC-03:30). The gap is currently +6h 30m.
How do I convert HST time to NST time?
Add +6h 30m to HST local time. For example, 9:00 AM in HST is 3:30 PM in NST.
What time is it in NST right now?
NST uses NST at UTC-03:30. Use the live converter at the top of this page — it updates in real time and already accounts for the +6h 30m offset from HST.
What is the best time to call NST from HST?
Call between 9:00 AM and 10:30 AM HST — that maps to 3:30 PM–5:00 PM NST and keeps both parties inside the working day.
Which is ahead, HST or NST?
HST is 6 hours 30 minutes ahead of NST. When it is 12:00 PM in HST it is 6:30 PM in NST.
Does daylight saving time affect the HST–NST difference?
Neither zone observes daylight saving time, so the +6h 30m offset between HST and NST 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 NST?
Not normally. The +6h 30m gap only pushes the date over for late-evening times.
What is the time difference between HST and NST?
NST is +6h 30m from HST.
What timezone is HST in?
HST operates on its local timezone.
What timezone is NST in?
NST 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 NST timezone?
Major cities in the NST timezone include St. John's, Corner Brook, Mount Pearl.
What is the UTC offset for NST?
Newfoundland Standard Time (NST) is at UTC-03:30. During daylight saving time, it shifts to NDT.
What should I know about the NST timezone?
NST is one of only a few half-hour offset time zones in the world. Newfoundland joined Canada in 1949 and kept its unique time zone.
When is it midnight in HST, what time is it in NST?
When it is 12:00 AM (midnight) in HST (HST), it is +6h 30m later in NST (NST).
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See every conversion from HST →·See every conversion from NST →