Honolulu to Casper time converter
Casper is 4 hours ahead of Honolulu. When it is 9:00 AM in Honolulu, it is 1:00 PM in Casper.
9:19 AM in Honolulu, Saturday, October 17, 2026
Honolulu to Casper conversion table
Every hour of today in Honolulu and the matching time in Casper. Light rows are typical working hours (9:00–18:00).
| Honolulu | Casper |
|---|---|
| 12:00 AM | 4:00 AM |
| 1:00 AM | 5:00 AM |
| 2:00 AM | 6:00 AM |
| 3:00 AM | 7:00 AM |
| 4:00 AM | 8:00 AM |
| 5:00 AM | 9:00 AM |
| 6:00 AM | 10:00 AM |
| 7:00 AM | 11:00 AM |
| 8:00 AM | 12:00 PM |
| 9:00 AM | 1:00 PM |
| 10:00 AM | 2:00 PM |
| 11:00 AM | 3:00 PM |
| 12:00 PM | 4:00 PM |
| 1:00 PM | 5:00 PM |
| 2:00 PM | 6:00 PM |
| 3:00 PM | 7:00 PM |
| 4:00 PM | 8:00 PM |
| 5:00 PM | 9:00 PM |
| 6:00 PM | 10:00 PM |
| 7:00 PM | 11:00 PM |
| 8:00 PM | 12:00 AM+1 day |
| 9:00 PM | 1:00 AM+1 day |
| 10:00 PM | 2:00 AM+1 day |
| 11:00 PM | 3:00 AM+1 day |
Best time to call or meet
Both sides are at work from 9:00 AM – 2:00 PM in Honolulu (1:00 PM – 6:00 PM in Casper).
Daylight saving time and the difference
The difference changes during the year because Honolulu and Casper switch clocks on different dates:
- Oct 17, 2026 – Oct 31, 2026: +4h
- Oct 31, 2026 – Mar 13, 2027: +3h
- Mar 13, 2027 – Oct 17, 2027: +4h
Distance
Honolulu and Casper are 5,314 km (3,302 miles) apart in a straight line.
More conversions
Questions and answers
What is the time difference between Honolulu and Casper?
Casper is 4 hours ahead of Honolulu.
What time is it in Casper when it is 9 AM in Honolulu?
When it is 9:00 AM in Honolulu, it is 1:00 PM in Casper.
When is the best time to call Casper from Honolulu?
Both sides are at work from 9:00 AM – 2:00 PM in Honolulu (1:00 PM – 6:00 PM in Casper).
Does the time difference between Honolulu and Casper change?
Yes, for part of the year, because daylight saving time starts and ends on different dates or applies on one side only.