The holiday planner combines Swiss public holidays, regional holidays, school holidays and your selected vacation days in one year view. A useful free-day block is rarely just one date: it depends on the canton, the surrounding weekends, school calendars, travel demand and how many vacation days you can realistically use.
Start with the canton if regional holidays or school holidays matter for your household. Then compare the full year before choosing single days. New Year's Day, Epiphany, May holidays, Ascension, Corpus Christi, National Day and the Christmas period can create very different blocks depending on the weekday.
For family plans, verify the canton and municipality in the school holiday overview. For cross-canton teams, place the approved Ferien block in calendar weeks and preserve that exact canton when sharing or exporting.