Every year, there's the International Museum Day around May 18 - and the German version takes place on Sunday, May 21. So if you have nothing planned for the day after tomorrow, you might consider going to see a museum or two. A lot of them offer specials, such as free entry, or there's special exhibition openings, or events taking place.
In case of the Stadtmuseum Erlangen, there's the opening of the new special exhibition about Stone Age - and I will be doing demonstrations about early textile techniques. Demos start at about 11:45, when the official opening ceremony and speeches are done. I'm already looking forward to it!
So if you're in the area, stop by and say hello, and enjoy the newly opened exhibition!