PHT to HST
-18hPHT
PHTSOURCEHST
HSTGreen rows indicate typical business hours (9 AM - 5 PM)
PHT and HST on the World Map
The map below highlights the PHT (Philippine Time) and HST (Hawaii Standard Time) timezone regions across the globe.
PHT – Philippine Time
UTC+08:00Philippine Time (PHT, UTC+08:00) is the time zone for the Philippines, 8 hours ahead of UTC.
- •Philippine Time does not observe daylight saving, so UTC+08:00 is fixed all year.
- •PHT shares its offset with China, Hong Kong, Singapore and Malaysia.
- •Manila is one of the largest outsourcing hubs in the world.
- •The Philippines spans one time zone despite being an archipelago of over 7,600 islands.
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).
Comparing Time Zones: PHT and HST
PHT runs on Philippine Time (PHT) at UTC+08:00. HST runs on Hawaii Standard Time (HST) at UTC-10:00. That puts PHT 18 hours behind HST — a difference of -18h at the current offsets.
In practice, when it is 9:00 AM in PHT it is 3:00 PM in HST on the previous day. Midnight in PHT is 6:00 AM in HST. Neither zone observes daylight saving time, so the offset between them stays constant all year.
PHT to HST time conversion table
| PHT (PHT) | HST (HST) | Day |
|---|---|---|
| 12:00 AM | 6:00 AM | previous day |
| 6:00 AM | 12:00 PM | previous day |
| 7:00 AM | 1:00 PM | previous day |
| 8:00 AM | 2:00 PM | previous day |
| 9:00 AM | 3:00 PM | previous day |
| 12:00 PM | 6:00 PM | previous day |
| 3:00 PM | 9:00 PM | previous day |
| 5:00 PM | 11:00 PM | previous day |
| 6:00 PM | 12:00 AM | same day |
| 9:00 PM | 3:00 AM | same day |
Why people convert PHT to HST time
- Scheduling a call from PHT to HST: a 10:00 AM start in PHT lands at 4:00 PM in HST the previous day, so you can confirm the slot without doing the arithmetic yourself.
- Handling a -18h gap: PHT and HST have no overlap inside a normal 9-to-5 day, so real-time meetings need an early-morning or late-evening slot on one side. 9:00 AM in HST is 3:00 PM in PHT.
- Coordinating a PHT-based team with HST contacts: quoting times in the other side's local clock — not your own — removes the single biggest source of missed meetings.
- Always state the zone abbreviation, not just the hour. "3:00 PM PHT" is unambiguous; "3 PM" across a -18h gap is not.
- With a -18h gap there is no shared 9-to-5 window, so alternate the early start: one week PHT takes the early slot, the next week HST does.
About PHT (Philippine Time)
Philippine Time (PHT) is fixed at UTC+08:00 all year. The Philippines has not observed daylight saving time since 1978, apart from a brief trial in 1990. PHT shares its offset with China Standard Time, Hong Kong Time, Singapore Time, Malaysian Time and Australian Western Standard Time, which makes Manila a convenient bridge for scheduling across East and Southeast Asia. As one of the world's largest centres for business process outsourcing, Manila keeps overlapping hours with both Australia and, on early shifts, the United States, and its contact-centre schedules are usually planned around Manila local time.
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.
Best time to call between PHT and HST
With a -18h offset there is no overlap inside a normal 9 AM – 5 PM day. HST opens at 9:00 AM HST, which is 3:00 PM in PHT, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
PHT and HST have no shared working hours because of the -18h gap. Teams need to alternate early starts or rely on asynchronous handovers.
PHT is 18 hours behind HST (PHT UTC+08:00 → HST UTC-10:00). There is no shared 9-to-5 window, so plan around an early or late slot. Remember to re-check around daylight-saving transitions.
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 PHT and HST?
PHT (PHT, UTC+08:00) is 18 hours behind HST (HST, UTC-10:00). The gap is currently -18h.
How do I convert PHT time to HST time?
Add -18h to PHT local time. For example, 9:00 AM in PHT is 3:00 PM in HST (previous day).
What time is it in HST right now?
HST uses HST at UTC-10:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -18h offset from PHT.
What is the best time to call HST from PHT?
There is no shared working-hours window because of the -18h gap. The closest option is 1:00 PM in PHT, which is 7:00 PM in HST.
Which is behind, PHT or HST?
PHT is 18 hours behind HST. When it is 12:00 PM in PHT it is 6:00 PM in HST.
Does daylight saving time affect the PHT–HST difference?
Neither zone observes daylight saving time, so the -18h offset between PHT and HST is fixed all year.
Which other cities share PHT's time zone?
PHT also covers Manila, Quezon City, Davao City, Cebu City, Zamboanga.
Which countries use PHT, PHT's zone?
PHT is used in Philippines.
Is there a day difference between PHT and HST?
Sometimes. The -18h gap is large enough that 8:00 PM or later in PHT already falls on the in HST.
What is the time difference between PHT and HST?
HST is -18h from PHT.
What timezone is PHT in?
PHT operates on its local timezone.
What timezone is HST in?
HST operates on its local timezone.
Which countries use PHT (Philippine Time)?
PHT is used in Philippines.
Does PHT observe daylight saving time?
No, PHT does not observe daylight saving time and remains at UTC+08:00 year-round.
What are some interesting facts about PHT?
Philippine Time does not observe daylight saving, so UTC+08:00 is fixed all year. PHT shares its offset with China, Hong Kong, Singapore and Malaysia.
Which cities are in the HST timezone?
Major cities in the HST timezone include Honolulu, Hilo, Kailua, Pearl City, Kapolei.
What is the UTC offset for HST?
Hawaii Standard Time (HST) is at UTC-10:00.
What should I know about the HST timezone?
Hawaii does not observe daylight saving time. HST is 5 hours behind EST in winter and 6 hours behind EDT in summer.
When is it midnight in PHT, what time is it in HST?
When it is 12:00 AM (midnight) in PHT (PHT), it is -18h later in HST (HST).
Related Developer Tools
Explore more tools that work great with timezone conversions for international teams:
Related Timezone Conversions
More PHT time conversions
- pht to manila
- pht to philippines
- pht to new york
- pht to london
- pht to dubai
- pht to tokyo
- pht to singapore
- pht to sydney
- pht to los angeles
- pht to paris
- pht to delhi
- pht to mumbai
- pht to berlin
- pht to hong kong
- pht to toronto
- pht to kathmandu
- new york to pht
- london to pht
- dubai to pht
- tokyo to pht
- singapore to pht
- sydney to pht
- los angeles to pht
- paris to pht
- delhi to pht
- mumbai to pht
- berlin to pht
- hong kong to pht
- toronto to pht
- kathmandu to pht
See every conversion from PHT →·See every conversion from HST →