Инструменты Intosoft

HST to PDT

+3h

HST

HSTSOURCE
UTC-10:00
HH12
:
MM00
  
12:00 (24-hr)
12 AM6 AM12 PM6 PM12 AM

PDT

PDT
UTC-07:00☀ DST active
HH03
:
MM00
  
15:00 (24-hr)
12 AM6 AM12 PM6 PM12 AM
HST
PDT
12:00 AM
3:00 AM
2:00 AM
5:00 AM
4:00 AM
7:00 AM
6:00 AM
9:00 AM
8:00 AM
11:00 AM
10:00 AM
1:00 PM
12:00 PM
3:00 PM
2:00 PM
5:00 PM
4:00 PM
7:00 PM
6:00 PM
9:00 PM
8:00 PM
11:00 PM
10:00 PM
1:00 AM+1

Green rows indicate typical business hours (9 AM - 5 PM)

HST and PDT on the World Map

The map below highlights the HST (Hawaii Standard Time) and PDT (Pacific Daylight Time) timezone regions across the globe.

HSTPDTHonoluluHiloKailuaPearl CityLos AngelesSan FranciscoSeattleVancouver
HST Zone
→
PDT Zone

Explore all world timezones interactively →

HST – Hawaii Standard Time

UTC-10:00

Hawaii Standard Time (HST) is the time zone for the Hawaiian Islands, 10 hours behind UTC.

Countries in HST
United States (Hawaii)
Major Cities in HST
HonoluluHiloKailuaPearl CityKapolei
Key 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.
  • •Hawaii is one of only two US states that don't observe DST (the other is Arizona).
Daylight Saving:No – UTC-10:00 year-round
Learn more about HST on Wikipedia

PDT – Pacific Daylight Time

UTC-07:00

Pacific Daylight Time (PDT) is the daylight saving offset on the US/Canada Pacific coast, 7 hours behind UTC.

Countries in PDT
United States (Pacific)Canada (British Columbia)Mexico (Baja California)
Major Cities in PDT
Los AngelesSan FranciscoSeattleVancouverPortland
Key Facts about PDT
  • •PDT aligns with MST at UTC-07:00.
  • •Tech company earnings calls often reference PDT/PST times.
Daylight Saving:Yes – switches to PST
Learn more about PDT on Wikipedia

Comparing Time Zones: HST and PDT

HST runs on Hawaii Standard Time (HST) at UTC-10:00. PDT runs on Pacific Daylight Time (PDT) at UTC-07:00. That puts HST 3 hours ahead of PDT — a difference of +3h at the current offsets.

In practice, when it is 9:00 AM in HST it is 12:00 PM in PDT. Midnight in HST is 3:00 AM in PDT. Neither zone observes daylight saving time, so the offset between them stays constant all year.

HST to PDT time conversion table

HST (HST)PDT (PDT)Day
12:00 AM3:00 AMsame day
6:00 AM9:00 AMsame day
7:00 AM10:00 AMsame day
8:00 AM11:00 AMsame day
9:00 AM12:00 PMsame day
12:00 PM3:00 PMsame day
3:00 PM6:00 PMsame day
5:00 PM8:00 PMsame day
6:00 PM9:00 PMsame day
9:00 PM12:00 AMnext day

Why people convert HST to PDT time

  • Scheduling a call from HST to PDT: a 10:00 AM start in HST lands at 1:00 PM in PDT, so you can confirm the slot without doing the arithmetic yourself.
  • Finding shared working hours: both HST and PDT are inside the 9-to-5 working day between 9:00 AM and 2:00 PM HST time (12:00 PM–5:00 PM PDT). That is roughly 5 hours of usable overlap.
  • Keeping family and friends in sync: knowing that 8:00 PM in HST is 11:00 PM in PDT 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 +3h gap is not.
  • Block 9:00 AM–2:00 PM HST as the recurring meeting window if you work primarily from HST and need PDT 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 PDT (Pacific Daylight Time)

Pacific Daylight Time (PDT) is observed from March to November on the Pacific coast. During PDT, the west coast is 7 hours behind UTC and only 2 hours behind the east coast's EDT.

Best time to call between HST and PDT

Both HST and PDT sit inside the 9 AM – 5 PM working day between 9:00 AM–2:00 PM HST, which is 12:00 PM–5:00 PM PDT. That gives roughly 5 hours of shared time — the safest window for a live call or meeting.

Business hours overlap

HST and PDT share 5 hours of working-hours overlap (9:00 AM–2:00 PM HST), so scheduling a live meeting is straightforward.

HST is 3 hours ahead of PDT (HST UTC-10:00 → PDT UTC-07:00). The shared working window is 9:00 AM–2:00 PM HST. Remember to re-check around daylight-saving transitions.

🕐 Daylight Saving Time Info

HST

Does not observe DST

PDT

☀ Currently in DST

Standard: UTC-08:00 · DST: UTC-07:00

Clocks fall back on Sun, Nov 1, 2026

Frequently Asked Questions

What is the time difference between HST and PDT?

HST (HST, UTC-10:00) is 3 hours ahead of PDT (PDT, UTC-07:00). The gap is currently +3h.

How do I convert HST time to PDT time?

Add +3h to HST local time. For example, 9:00 AM in HST is 12:00 PM in PDT.

What time is it in PDT right now?

PDT uses PDT at UTC-07:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +3h offset from HST.

What is the best time to call PDT from HST?

Call between 9:00 AM and 2:00 PM HST — that maps to 12:00 PM–5:00 PM PDT and keeps both parties inside the working day.

Which is ahead, HST or PDT?

HST is 3 hours ahead of PDT. When it is 12:00 PM in HST it is 3:00 PM in PDT.

Does daylight saving time affect the HST–PDT difference?

Neither zone observes daylight saving time, so the +3h offset between HST and PDT 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 PDT?

Not normally. The +3h gap only pushes the date over for late-evening times.

What is the time difference between HST and PDT?

PDT is +3h from HST.

What timezone is HST in?

HST operates on its local timezone.

What timezone is PDT in?

PDT 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 PDT timezone?

Major cities in the PDT timezone include Los Angeles, San Francisco, Seattle, Vancouver, Portland.

What is the UTC offset for PDT?

Pacific Daylight Time (PDT) is at UTC-07:00. During daylight saving time, it shifts to PST.

What should I know about the PDT timezone?

PDT aligns with MST at UTC-07:00. Tech company earnings calls often reference PDT/PST times.

When is it midnight in HST, what time is it in PDT?

When it is 12:00 AM (midnight) in HST (HST), it is +3h later in PDT (PDT).