On what date?!
Answers: is Fastnacht Day?
Hope this helps!
Mardi Gras in Germany -
In 2008 Fastnacht falls on February 5 (Faschingsdienstag). The official start of the Fasching season is either January 7 (the day after Ephiphany, Dreik?nige) or the 11th day of the 11th month (Elfter im Elften, Nov. 11), depending on the region. That gives the Carnival guilds (Zünfte) three to four months to organize each year's events (Carnival balls, parades, royalty, etc.) leading up to the big bash in the week before Ash Wednesday (Aschermittwoch), when the Lenten season (die Fastenzeit) begins.
the day before ash wednesday
It varies according to the religious calender. It will be 5Th of February this year. (also known as Shrove Tuesday)
Feb 5th
Lent begins on Ash Wednesday, February 21, 2007. In Pennsylvania Dutch country, February 20, Shrove Tuesday, the day before the start of Lent, is known as "Fastnacht Day." The Pennsylvania Dutch celebrate Shrove Tuesday by eating yeast raised potato doughnuts, which are lovingly known as "Fastnachts.""