HST to Bucharest
+13hHST
HSTSOURCEBucharest
EESTGreen rows indicate typical business hours (9 AM - 5 PM)
HST and EEST on the World Map
The map below highlights the HST (Hawaii Standard Time) and EEST (Eastern European 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).
EET – Eastern European Time
UTC+02:00Eastern European Time (EET) is used in Eastern Europe, the Middle East, and northeastern Africa, 2 hours ahead of UTC.
- •EET covers countries across three continents: Europe, Asia, and Africa.
- •Cairo is the most populous city in the EET zone.
- •Turkey used to be on EET but permanently moved to UTC+03:00 in 2016.
- •Finland, the Baltic states, and Greece all use EET.
Understanding the +13h Gap: HST vs Bucharest
HST runs on Hawaii Standard Time (HST) at UTC-10:00. Bucharest runs on Eastern European Summer Time (EEST) at UTC+03:00, also currently on daylight saving time. That puts HST 13 hours ahead of Bucharest — a difference of +13h at the current offsets.
In practice, when it is 9:00 AM in HST it is 10:00 PM in Bucharest. Midnight in HST is 1:00 PM in Bucharest.Bucharest observes daylight saving time while HST does not, so the gap narrows or widens by an hour part of the year.
HST to Bucharest time conversion table
| HST (HST) | Bucharest (EEST) | Day |
|---|---|---|
| 12:00 AM | 1:00 PM | same day |
| 6:00 AM | 7:00 PM | same day |
| 7:00 AM | 8:00 PM | same day |
| 8:00 AM | 9:00 PM | same day |
| 9:00 AM | 10:00 PM | same day |
| 12:00 PM | 1:00 AM | next day |
| 3:00 PM | 4:00 AM | next day |
| 5:00 PM | 6:00 AM | next day |
| 6:00 PM | 7:00 AM | next day |
| 9:00 PM | 10:00 AM | next day |
Why people convert HST to Bucharest time
- Scheduling a call from HST to Bucharest: a 10:00 AM start in HST lands at 11:00 PM in Bucharest, so you can confirm the slot without doing the arithmetic yourself.
- Handling a +13h gap: HST and Bucharest 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 Bucharest is 10:00 PM in HST.
- Coordinating a HST-based team with Bucharest 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 HST" is unambiguous; "3 PM" across a +13h gap is not.
- With a +13h gap there is no shared 9-to-5 window, so alternate the early start: one week HST takes the early slot, the next week Bucharest does.
- Bucharest: Clocks fall back on Sun, Oct 25, 2026. Any meeting series spanning that date will shift by an hour in 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.
About EET (Eastern European Time)
Eastern European Time (EET) covers a wide geographical area including Eastern Europe (Finland, Greece, Romania, Bulgaria, Ukraine), the Middle East (Israel, Lebanon, Jordan), and northeastern Africa (Egypt, Libya). During summer, most EET countries switch to Eastern European Summer Time (EEST, UTC+03:00). Turkey permanently moved to UTC+03:00 in 2016, effectively leaving EET.
Best time to call between HST and Bucharest
With a +13h offset there is no overlap inside a normal 9 AM – 5 PM day. Bucharest opens at 9:00 AM EEST, which is 10:00 PM in HST, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
HST and Bucharest have no shared working hours because of the +13h gap. Teams need to alternate early starts or rely on asynchronous handovers.
HST is 13 hours ahead of Bucharest (HST UTC-10:00 → EEST UTC+03:00). There is no shared 9-to-5 window, so plan around an early or late slot. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
HST
Does not observe DST
Bucharest
☀ Currently in DST
Standard: UTC+02:00 · DST: UTC+03:00
Clocks fall back on Sun, Oct 25, 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 Bucharest?
HST (HST, UTC-10:00) is 13 hours ahead of Bucharest (EEST, UTC+03:00). The gap is currently +13h.
How do I convert HST time to Bucharest time?
Add +13h to HST local time. For example, 9:00 AM in HST is 10:00 PM in Bucharest.
What time is it in Bucharest right now?
Bucharest uses EEST at UTC+03:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +13h offset from HST.
What is the best time to call Bucharest from HST?
There is no shared working-hours window because of the +13h gap. The closest option is 1:00 PM in HST, which is 2:00 AM in Bucharest.
Which is ahead, HST or Bucharest?
HST is 13 hours ahead of Bucharest. When it is 12:00 PM in HST it is 1:00 AM in Bucharest.
Do HST and Bucharest use different time zones?
HST uses HST at UTC-10:00, while Bucharest (Romania) uses EEST at UTC+03:00. The IANA identifiers are Pacific/Honolulu and Europe/Bucharest.
Does daylight saving time affect the HST–Bucharest difference?
Yes at the moment: Bucharest is on daylight saving time and HST is not, so the +13h gap shifts by an hour when exactly one of them changes clocks.
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 Bucharest?
Sometimes. The +13h gap is large enough that 8:00 PM or later in HST already falls on the next day in Bucharest.
What is the time difference between HST and Bucharest?
Bucharest is +13h from HST.
What timezone is HST in?
HST operates on its local timezone.
What timezone is Bucharest in?
Bucharest 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 EET timezone?
Major cities in the EET timezone include Cairo, Athens, Helsinki, Bucharest, Kyiv, Sofia, Jerusalem, Tel Aviv.
What is the UTC offset for EET?
Eastern European Time (EET) is at UTC+02:00. During daylight saving time, it shifts to EEST.
What should I know about the EET timezone?
EET covers countries across three continents: Europe, Asia, and Africa. Cairo is the most populous city in the EET zone.
When is it midnight in HST, what time is it in Bucharest?
When it is 12:00 AM (midnight) in HST (HST), it is +13h later in Bucharest (EET).
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