Vienna to Boulder time converter

Boulder is 8 hours behind Vienna. When it is 9:00 AM in Vienna, it is 1:00 AM in Boulder.

Vienna CEST

Saturday, October 17, 2026

Boulder MDT

Saturday, October 17, 2026

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

Vienna to Boulder conversion table

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

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

Best time to call or meet

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

Daylight saving time and the difference

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

  • Oct 17, 2026 – Oct 25, 2026: -8h
  • Oct 25, 2026 – Nov 1, 2026: -7h
  • Nov 1, 2026 – Mar 14, 2027: -8h
  • Mar 14, 2027 – Mar 28, 2027: -7h
  • Mar 28, 2027 – Oct 17, 2027: -8h

Distance

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

More conversions

Boulder to ViennaVienna to New YorkVienna to LondonVienna to Los AngelesVienna to ChicagoVienna to TorontoVienna to São PauloVienna to ParisVienna to BerlinVienna to MoscowVienna to DubaiVienna to New DelhiVienna to Bangkok
New York to BoulderLondon to BoulderLos Angeles to BoulderChicago to BoulderToronto to BoulderSão Paulo to BoulderParis to BoulderBerlin to BoulderMoscow to BoulderDubai to BoulderNew Delhi to BoulderBangkok to Boulder

Questions and answers

What is the time difference between Vienna and Boulder?

Boulder is 8 hours behind Vienna.

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

When it is 9:00 AM in Vienna, it is 1:00 AM in Boulder.

When is the best time to call Boulder from Vienna?

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

Does the time difference between Vienna and Boulder change?

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