Summer (May to October): Tuesday to Friday from 10 a.m. to 6 p.m., Saturday/Sunday/public holidays from 9 a.m. to 6 p.m., closed on Mondays
Winter (December to March): Thursday, Friday, Saturday, Sunday and public holidays from 9 a.m. to 4 p.m. and during the Christmas and semester break (Vienna / Lower Austria and Styria) open daily
Catering is also possible for groups outside of the opening times.