Unable to answer "Are these opening hours still correct?" – Restaurant Langenberg (Bärentreff) (Restaurant) – https://osm.org/node/5610719344 via StreetComplete 57.4:

Mrz-Okt: Mo-Fr 9-17, Sa,So,Feiertage 9-19
Nov-Feb: Mo-Fr 9-15, Sa,So,Feiertage 9-17