Zurich'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 Zurich'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 Zurich'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 Zurich's own year — not a headcount.
#1 Zurich Marathon →
11 April 2027 — we checked these dates against the organiser's own site
Zurich Marathon is the busiest of Zurich's 1 verified major events — its day is Packed, busier than 89% of Zurich's year.
The 2027 Zurich Marathon in Zurich runs 11 Apr 2027, confirmed; expect Packed days — busier than 89% of Zurich's year. (Avoid-Crowds, as of 2026-09-13; recomputed nightly.)
Planning Zurich 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.