Boulder to Vienna time converter

Vienna is 8 hours ahead of Boulder. When it is 9:00 AM in Boulder, it is 5:00 PM in Vienna.

Boulder MDT

Saturday, October 17, 2026

Vienna CEST

Saturday, October 17, 2026

Boulder
Colorado, United States
Sat, Oct 17
MDTUTC-6
Vienna
Austria
Sat, Oct 17
CESTUTC+2+8h
Finding your time zone…
Shared working hours (9:00–18:00)

Boulder to Vienna conversion table

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

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

Best time to call or meet

Both sides are at work from 9:00 AM – 10:00 AM in Boulder (5:00 PM – 6:00 PM in Vienna).

Daylight saving time and the difference

The difference changes during the year because Boulder and Vienna switch clocks on different dates:

  • Oct 17, 2026 – Oct 24, 2026: +8h
  • Oct 24, 2026 – Nov 1, 2026: +7h
  • Nov 1, 2026 – Mar 14, 2027: +8h
  • Mar 14, 2027 – Mar 27, 2027: +7h
  • Mar 27, 2027 – Oct 17, 2027: +8h

Distance

Boulder and Vienna are 8,649 km (5,374 miles) apart in a straight line.

More conversions

Vienna to BoulderBoulder to New YorkBoulder to LondonBoulder to Los AngelesBoulder to ChicagoBoulder to TorontoBoulder to São PauloBoulder to ParisBoulder to BerlinBoulder to MoscowBoulder to DubaiBoulder to New DelhiBoulder to Bangkok
New York to ViennaLondon to ViennaLos Angeles to ViennaChicago to ViennaToronto to ViennaSão Paulo to ViennaParis to ViennaBerlin to ViennaMoscow to ViennaDubai to ViennaNew Delhi to ViennaBangkok to Vienna

Questions and answers

What is the time difference between Boulder and Vienna?

Vienna is 8 hours ahead of Boulder.

What time is it in Vienna when it is 9 AM in Boulder?

When it is 9:00 AM in Boulder, it is 5:00 PM in Vienna.

When is the best time to call Vienna from Boulder?

Both sides are at work from 9:00 AM – 10:00 AM in Boulder (5:00 PM – 6:00 PM in Vienna).

Does the time difference between Boulder and Vienna change?

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