Karfreitag can't be a bridge day since it is a public holiday (gesetzlicher Feiertag). Although Thursday was a regional commemoration day (Gründonnerstag), it

Karfreitag can't be a bridge day since it is a public holiday (gesetzlicher Feiertag). Although Thursday was a regional commemoration day (Gründonnerstag), it wasn't a public holiday, so most people still worked.