HST to CLT Time Converter
CLT is 7 hours ahead of HST. HST is UTC-10:00, and Chile is currently on UTC-3:00.
Best Time to Call Between HST and CLT
Both zones are inside normal business hours between 9:00 AM and 10:00 AM HST — that's 4:00 PM to 5:00 PM CLT. That's a 1-hour window.
both at work HST only CLT only neither — hours along the strip are HST.
Common Times Converted
HST on the left, CLT on the right.
HST to CLT: Full 24-Hour Conversion Table
Shaded rows are working hours; the darker shade marks the hours when both zones are at work.
| HST | CLT | Working hours |
|---|---|---|
| 12:00 AM | 7:00 AM | — |
| 1:00 AM | 8:00 AM | — |
| 2:00 AM | 9:00 AM | CLT only |
| 3:00 AM | 10:00 AM | CLT only |
| 4:00 AM | 11:00 AM | CLT only |
| 5:00 AM | 12:00 PM | CLT only |
| 6:00 AM | 1:00 PM | CLT only |
| 7:00 AM | 2:00 PM | CLT only |
| 8:00 AM | 3:00 PM | CLT only |
| 9:00 AM | 4:00 PM | Both zones |
| 10:00 AM | 5:00 PM | HST only |
| 11:00 AM | 6:00 PM | HST only |
| 12:00 PM | 7:00 PM | HST only |
| 1:00 PM | 8:00 PM | HST only |
| 2:00 PM | 9:00 PM | HST only |
| 3:00 PM | 10:00 PM | HST only |
| 4:00 PM | 11:00 PM | HST only |
| 5:00 PM | 12:00 AM next day | — |
| 6:00 PM | 1:00 AM next day | — |
| 7:00 PM | 2:00 AM next day | — |
| 8:00 PM | 3:00 AM next day | — |
| 9:00 PM | 4:00 AM next day | — |
| 10:00 PM | 5:00 AM next day | — |
| 11:00 PM | 6:00 AM next day | — |
What HST and CLT Actually Are
HST — Hawaii Standard Time
Honolulu and the rest of Hawaii. Standing at UTC-10:00 as written, and the region does not change its clocks, so that offset holds all year. Hawaii does not observe daylight saving, so this offset holds all year.
Hawaii dropped daylight saving in 1967 and never resumed it. Being close to the equator, its daylight barely varies across the year, so there is little to gain.
CLT — Chile Standard Time
Santiago, Valparaíso, Concepción. Standing at UTC-4:00 as written, and the region does change its clocks, so its live offset moves by an hour twice a year. The next change is on Saturday, April 3, 2027, to -04. Chile still changes its clocks, moving to CLST (UTC-3) for the southern summer.
Chile is one of very few countries still moving its clocks, and the Magallanes region in the far south stays on UTC-3 permanently while the rest of the country switches.
What This Means in Practice
This gap is not fixed
CLT changes its clocks and HST does not, so the difference between them moves by an hour twice a year. A recurring meeting set now will drift for one side from Saturday, April 3, 2027 unless someone resets it.
Major Cities in Each Zone
Cities on HST
Cities on CLT
Frequently Asked Questions
What is the time difference between HST and CLT?
CLT is 7 hours ahead of HST. That is the live figure. Taken strictly as written, the gap between HST and CLT is 6 hours — the two differ because at least one of these regions is currently on daylight saving.
What is 9:00 AM HST in CLT?
9:00 AM HST is 4:00 PM CLT.
What are the best hours to schedule a call between HST and CLT?
Between 9:00 AM and 10:00 AM HST, which is 4:00 PM to 5:00 PM CLT. Both sides are inside normal business hours through that window.
Does the difference between HST and CLT change during the year?
Yes. CLT observes daylight saving and HST does not, so the gap shifts by an hour at least twice a year. The next clock change is on Saturday, April 3, 2027.
Does HST always mean Hawaii Standard Time?
Hawaii does not observe daylight saving, so this offset holds all year.
Does CLT always mean Chile Standard Time?
Chile still changes its clocks, moving to CLST (UTC-3) for the southern summer.