Reflecting the rich diversity of the Viennese population, the City of Vienna hosts an intercultural calendar offering a overview of the most important festivals observed by its largest religious and ethnic groups. The calendar also includes Vienna’s traditional holidays and international commemoration days of the United Nations and other organizations without intending to be exhaustive.  Each entry in the online calendar provides a short description of  the festival, holiday or commemorative day highlighted.
A summary calendar is available for download as pdf in the German language.

City of Vienna Intercultural Calendar