What Germans do after work: they grab a beer and hang outwith friends. They also drink beers before work (like for breakfast) but those beers they just call "bier" and not "feierabendbier".
The glorious moment you slam shut your laptop, hang up your hard hat or toss down your tools and officially declare “I’m off the clock, baby!”
Constitutes of the words Feier (=celebration, party) and Abend (=Evening) and is often accompanied by the traditional Feierabendbier (= beer) or Feierabendbierchen (=small beer) aka happy hour beer.
Synonyms: knock‐off time, quitting time, TGIF on a daily loop.
Schönen Feierabend! (=Wishing a co-worker to enjoy there evening when they log off)
"Yo Dirk, want to go for a Feierabendbier tonight?" - "Ja Markus, auf geht's (=let's go)."