Casper to Honolulu time converter

Honolulu is 4 hours behind Casper. When it is 9:00 AM in Casper, it is 5:00 AM in Honolulu.

Casper MDT

Saturday, October 17, 2026

Honolulu HST

Saturday, October 17, 2026

Casper
Wyoming, United States
Sat, Oct 17
MDTUTC-6
Honolulu
Hawaii, United States
Sat, Oct 17
HSTUTC-10-4h
Finding your time zone…
Shared working hours (9:00–18:00)

Casper to Honolulu conversion table

Every hour of today in Casper and the matching time in Honolulu. Light rows are typical working hours (9:00–18:00).

CasperHonolulu
12:00 AM8:00 PM−1 day
1:00 AM9:00 PM−1 day
2:00 AM10:00 PM−1 day
3:00 AM11:00 PM−1 day
4:00 AM12:00 AM
5:00 AM1:00 AM
6:00 AM2:00 AM
7:00 AM3:00 AM
8:00 AM4:00 AM
9:00 AM5:00 AM
10:00 AM6:00 AM
11:00 AM7:00 AM
12:00 PM8:00 AM
1:00 PM9:00 AM
2:00 PM10:00 AM
3:00 PM11:00 AM
4:00 PM12:00 PM
5:00 PM1:00 PM
6:00 PM2:00 PM
7:00 PM3:00 PM
8:00 PM4:00 PM
9:00 PM5:00 PM
10:00 PM6:00 PM
11:00 PM7:00 PM

Best time to call or meet

Both sides are at work from 1:00 PM – 6:00 PM in Casper (9:00 AM – 2:00 PM in Honolulu).

Daylight saving time and the difference

The difference changes during the year because Casper and Honolulu switch clocks on different dates:

  • Oct 17, 2026 – Nov 1, 2026: -4h
  • Nov 1, 2026 – Mar 14, 2027: -3h
  • Mar 14, 2027 – Oct 17, 2027: -4h

Distance

Casper and Honolulu are 5,314 km (3,302 miles) apart in a straight line.

More conversions

Honolulu to CasperCasper to New YorkCasper to LondonCasper to Los AngelesCasper to ChicagoCasper to TorontoCasper to São PauloCasper to ParisCasper to BerlinCasper to MoscowCasper to DubaiCasper to New DelhiCasper to Bangkok
New York to HonoluluLondon to HonoluluLos Angeles to HonoluluChicago to HonoluluToronto to HonoluluSão Paulo to HonoluluParis to HonoluluBerlin to HonoluluMoscow to HonoluluDubai to HonoluluNew Delhi to HonoluluBangkok to Honolulu

Questions and answers

What is the time difference between Casper and Honolulu?

Honolulu is 4 hours behind Casper.

What time is it in Honolulu when it is 9 AM in Casper?

When it is 9:00 AM in Casper, it is 5:00 AM in Honolulu.

When is the best time to call Honolulu from Casper?

Both sides are at work from 1:00 PM – 6:00 PM in Casper (9:00 AM – 2:00 PM in Honolulu).

Does the time difference between Casper and Honolulu change?

Yes, for part of the year, because daylight saving time starts and ends on different dates or applies on one side only.