There is no special day. But many German cities got annual festivals where wine or beer (depends on the region) is celebrate.
Every day :-) Offically there is a "Tag des Bieres" (Day of beer) on April 23rd. But it's not celebrated in a special way.
german
what country celebrates Groundhog's Day? what country celebrates Groundhog's Day?
German who started brewing beer in Dunedin in 1857
Republika Srpska celebrates Independence Day and Republic Day on the same day.
Bier
A beer hall is a large German public house which specializes in beer.
The traditional German beer girl outfit is called a dirndl.
Smoked beer, which is often used in a German beer festival.
Epiphany celebrates the arrival of the Magi.
Beer
A german beer