Use of the hyphen

Compounds are seldom hyphenated as in English, where we often vacillate between using a hyphen in a given compound, writing it as two words or writing it as one word,
e.g. Wohnzimmer (lounge-room, lounge room, loungeroom), Küchentür (kitchen door), spottbillig (dirt cheap). There is no limit to how long such compounds can be in German,
e.g.Gerichtsberichterstatter (legal correspondent, lit. court report compiler).

When a hyphen is used, as in an Sonn- und Feiertagen (on Sundays and holidays) and auf- und zumachen (to open and shut), it is understood that 11 this stands for an Sonntagen und Feiertagen and aufmachen und zumachen and saves repeating the second part of the compound.