We (me, my wife and our 4-years-old daughter) are now in Munich and are now thinking what to do tomorrow (Dec 24) evening. We don't (or at least were not going to) celebrate Christmas, but apparently almost everything will be closed, including Christmas fairs, stores, restaurants, museums, etc. Is this true, and if yes, then what can you suggest?
Most restaurants and attractions will close on Christmas Eve at 16:00 or earlier. Even the Christmas Market at the airport will close at 17:00. Many will reopen on the 25th (e.g. Circus Krone, Therme Erding, Sea Life, Hellabrunn zoo).
Sightseeing by Tram
Use Tram 19 or 21 from Max-Weber-Platz to Karlsplatz/Stachus, and Tram 17 back to Max-Weber-Platz.
You might ask at the tourist info for more ideas.