Vienna's big events, and how busy they make the city
Every event here is verified by a person, dated from its own organiser, and set against Vienna's day-by-day crowd forecast — so they can be ranked on one scale. "Major" here means an event we have checked and approved as one of Vienna's biggest, whose days our own forecast reads Busy or Packed — or, for now, sit beyond the forecast window. See the city, day by day →
Calm · Lively · Busy · Packed rank a day against Vienna's own year — not a headcount.
joint #1 Academy of Management Annual Meeting (AOM 2027) →
30 July – 3 August 2027 — we checked these dates against the organiser's own site
Academy of Management Annual Meeting is joint busiest of Vienna's 8 verified major events — its busiest day is Packed, busier than 99% of Vienna's year.
The 2027 Academy of Management Annual Meeting in Vienna runs 30 Jul – 3 Aug 2027, confirmed; expect Packed days — busier than 99% of Vienna's year. (Avoid-Crowds, as of 2026-10-15; recomputed nightly.)
joint #1 Austrian National Day (Nationalfeiertag) - Armed Forces show on Heldenplatz →
24–26 October 2026 — we checked these dates against the organiser's own site
Austrian National Day is joint busiest of Vienna's 8 verified major events — its busiest day is Packed, busier than 99% of Vienna's year.
The 2026 Austrian National Day - Armed Forces show on Heldenplatz in Vienna runs 24–26 Oct 2026, confirmed; expect Packed days — busier than 99% of Vienna's year. (Avoid-Crowds, as of 2026-10-15; recomputed nightly.)
joint #1 Vienna City Marathon →
17–18 April 2027 — we checked these dates against the organiser's own site
Vienna City Marathon is joint busiest of Vienna's 8 verified major events — its busiest day is Packed, busier than 99% of Vienna's year.
The 2027 Vienna City Marathon in Vienna runs 17–18 Apr 2027, confirmed; expect Packed days — busier than 99% of Vienna's year. (Avoid-Crowds, as of 2026-10-15; recomputed nightly.)
#4 EGU General Assembly →
4–9 April 2027 — we checked these dates against the organiser's own site
EGU General Assembly ranks #4 of Vienna's 8 verified major events by crowd impact — its busiest day is Busy, busier than 74% of Vienna's year.
The 2027 EGU General Assembly in Vienna runs 4–9 Apr 2027, confirmed; expect Busy days — busier than 74% of Vienna's year. (Avoid-Crowds, as of 2026-10-15; recomputed nightly.)
#5 High End (hi-fi show) →
6–9 May 2027 — we checked these dates against the organiser's own site
High End ranks #5 of Vienna's 8 verified major events by crowd impact — its busiest day is Busy, busier than 73% of Vienna's year.
The 2027 High End in Vienna runs 6–9 May 2027, confirmed; expect Busy days — busier than 73% of Vienna's year. (Avoid-Crowds, as of 2026-10-15; recomputed nightly.)
joint #6 Summer Night Concert Schönbrunn (Vienna Philharmonic) →
11 June 2027 — we checked these dates against the organiser's own site
Summer Night Concert Schönbrunn ranks joint #6 of Vienna's 8 verified major events by crowd impact — its day is Busy, busier than 70% of Vienna's year.
The 2027 Summer Night Concert Schönbrunn in Vienna runs 11 Jun 2027, confirmed; expect Busy days — busier than 70% of Vienna's year. (Avoid-Crowds, as of 2026-10-15; recomputed nightly.)
joint #6 Vienna Comic Con (VIECC) →
21–22 November 2026 — we checked these dates against the organiser's own site
Vienna Comic Con ranks joint #6 of Vienna's 8 verified major events by crowd impact — its busiest day is Busy, busier than 70% of Vienna's year.
The 2026 Vienna Comic Con in Vienna runs 21–22 Nov 2026, confirmed; expect Busy days — busier than 70% of Vienna's year. (Avoid-Crowds, as of 2026-10-15; recomputed nightly.)
#8 European Congress of Radiology (ECR) →
3–7 March 2027 — we checked these dates against the organiser's own site
European Congress of Radiology ranks #8 of Vienna's 8 verified major events by crowd impact — its busiest day is Busy, busier than 65% of Vienna's year.
The 2027 European Congress of Radiology in Vienna runs 3–7 Mar 2027, confirmed; expect Busy days — busier than 65% of Vienna's year. (Avoid-Crowds, as of 2026-10-15; recomputed nightly.)
Planning Vienna around these dates? Timed entries and tours matched to the day's forecast
Who writes the city guides · Disclaimer — event dates can change; expected dates are labelled and can move.