CLT to HST
-6hCLT
CLTSOURCEHST
HSTGreen rows indicate typical business hours (9 AM - 5 PM)
CLT and HST on the World Map
The map below highlights the CLT (Chile Standard Time) and HST (Hawaii Standard Time) timezone regions across the globe.
CLT – Chile Standard Time
UTC-04:00Chile Standard Time (CLT) is the time zone for continental Chile, 4 hours behind UTC.
- •Chile observes daylight saving time, switching to CLST (UTC-03:00) in summer.
- •Santiago is the largest city in Chile with over 6 million in the metro area.
- •Chile spans over 4,300 km from north to south but uses one timezone.
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).
CLT vs HST: Offsets, DST and Best Call Times
CLT runs on Chile Standard Time (CLT) at UTC-04:00. HST runs on Hawaii Standard Time (HST) at UTC-10:00. That puts CLT 6 hours behind HST — a difference of -6h at the current offsets.
In practice, when it is 9:00 AM in CLT it is 3:00 AM in HST. Midnight in CLT is 6:00 PM in HST. Neither zone observes daylight saving time, so the offset between them stays constant all year.
CLT to HST time conversion table
| CLT (CLT) | HST (HST) | Day |
|---|---|---|
| 12:00 AM | 6:00 PM | previous day |
| 6:00 AM | 12:00 AM | same day |
| 7:00 AM | 1:00 AM | same day |
| 8:00 AM | 2:00 AM | same day |
| 9:00 AM | 3:00 AM | same day |
| 12:00 PM | 6:00 AM | same day |
| 3:00 PM | 9:00 AM | same day |
| 5:00 PM | 11:00 AM | same day |
| 6:00 PM | 12:00 PM | same day |
| 9:00 PM | 3:00 PM | same day |
Why people convert CLT to HST time
- Scheduling a call from CLT to HST: a 10:00 AM start in CLT lands at 4:00 AM in HST, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both CLT and HST are inside the 9-to-5 working day between 3:00 PM and 5:00 PM CLT time (9:00 AM–11:00 AM HST). That is roughly 2 hours of usable overlap.
- Keeping family and friends in sync: knowing that 8:00 PM in CLT is 2:00 PM in HST makes it easy to avoid calling at 3 AM.
- Always state the zone abbreviation, not just the hour. "3:00 PM CLT" is unambiguous; "3 PM" across a -6h gap is not.
- Block 3:00 PM–5:00 PM CLT as the recurring meeting window if you work primarily from CLT and need HST colleagues present.
About CLT (Chile Standard Time)
Chile Standard Time (CLT) is the standard time in Chile. During summer months (October to March), Chile switches to Chile Summer Time (CLST, UTC-03:00). Chile is the longest north-south country in the world.
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 CLT and HST
Both CLT and HST sit inside the 9 AM – 5 PM working day between 3:00 PM–5:00 PM CLT, which is 9:00 AM–11:00 AM HST. That gives roughly 2 hours of shared time — the safest window for a live call or meeting.
Business hours overlap
CLT and HST overlap for about 2 hours during the working day — enough for meetings if you avoid the edges of the window.
CLT is 6 hours behind HST (CLT UTC-04:00 → HST UTC-10:00). The shared working window is 3:00 PM–5:00 PM CLT. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
CLT
☀ Currently in DST
Standard: UTC-04:00 · DST: UTC-03:00
Clocks fall back on Sun, Apr 4, 2027
HST
Does not observe DST
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 CLT and HST?
CLT (CLT, UTC-04:00) is 6 hours behind HST (HST, UTC-10:00). The gap is currently -6h.
How do I convert CLT time to HST time?
Add -6h to CLT local time. For example, 9:00 AM in CLT is 3:00 AM in HST.
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 -6h offset from CLT.
What is the best time to call HST from CLT?
Call between 3:00 PM and 5:00 PM CLT — that maps to 9:00 AM–11:00 AM HST and keeps both parties inside the working day.
Which is behind, CLT or HST?
CLT is 6 hours behind HST. When it is 12:00 PM in CLT it is 6:00 AM in HST.
Does daylight saving time affect the CLT–HST difference?
Neither zone observes daylight saving time, so the -6h offset between CLT and HST is fixed all year.
Which other cities share CLT's time zone?
CLT also covers Santiago, Valparaíso, Concepción, Viña del Mar, Antofagasta.
Which countries use CLT, CLT's zone?
CLT is used in Chile.
Is there a day difference between CLT and HST?
Not normally. The -6h gap only pushes the date over the previous day.
What is the time difference between CLT and HST?
HST is -6h from CLT.
What timezone is CLT in?
CLT operates on its local timezone.
What timezone is HST in?
HST operates on its local timezone.
Which countries use CLT (Chile Standard Time)?
CLT is used in Chile.
Does CLT observe daylight saving time?
Yes, CLT switches to CLST during summer months.
What are some interesting facts about CLT?
Chile observes daylight saving time, switching to CLST (UTC-03:00) in summer. Santiago is the largest city in Chile with over 6 million in the metro area.
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 CLT, what time is it in HST?
When it is 12:00 AM (midnight) in CLT (CLT), it is -6h later in HST (HST).
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See every conversion from CLT →·See every conversion from HST →