Honolulu to Guidonia time converter

Guidonia is 12 hours ahead of Honolulu. When it is 9:00 AM in Honolulu, it is 9:00 PM in Guidonia.

Honolulu HST

Monday, October 19, 2026

Guidonia CEST

Tuesday, October 20, 2026

Honolulu
Hawaii, United States
Mon, Oct 19
HSTUTC-10
Guidonia
Italy
Tue, Oct 20
CESTUTC+2+12h
Finding your time zone…
Shared working hours (9:00–18:00)

Honolulu to Guidonia conversion table

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

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

Best time to call or meet

Working hours don't overlap fully. The closest fit is 9:00 AM – 10:00 AM in Honolulu (9:00 PM – 10:00 PM in Guidonia): working hours on one side, early or late on the other.

Daylight saving time and the difference

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

  • Oct 19, 2026 – Oct 24, 2026: +12h
  • Oct 24, 2026 – Mar 27, 2027: +11h
  • Mar 27, 2027 – Oct 19, 2027: +12h

Distance

Honolulu and Guidonia are 12,910 km (8,022 miles) apart in a straight line.

More conversions

Guidonia to HonoluluHonolulu to New YorkHonolulu to LondonHonolulu to Los AngelesHonolulu to ChicagoHonolulu to TorontoHonolulu to São PauloHonolulu to ParisHonolulu to BerlinHonolulu to MoscowHonolulu to DubaiHonolulu to New DelhiHonolulu to Bangkok
New York to GuidoniaLondon to GuidoniaLos Angeles to GuidoniaChicago to GuidoniaToronto to GuidoniaSão Paulo to GuidoniaParis to GuidoniaBerlin to GuidoniaMoscow to GuidoniaDubai to GuidoniaNew Delhi to GuidoniaBangkok to Guidonia

Questions and answers

What is the time difference between Honolulu and Guidonia?

Guidonia is 12 hours ahead of Honolulu.

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

When it is 9:00 AM in Honolulu, it is 9:00 PM in Guidonia.

When is the best time to call Guidonia from Honolulu?

Working hours don't overlap fully. The closest fit is 9:00 AM – 10:00 AM in Honolulu (9:00 PM – 10:00 PM in Guidonia): working hours on one side, early or late on the other.

Does the time difference between Honolulu and Guidonia change?

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