My father used to sing the Today is Monday song but I can't remember all the words. The following is what I remember

Today is Monday, Today is Monday
Monday roast beef
Tuesday (I can remember Tuesday's food)
Wednesday hassepfeffer
Thursday soup
Friday fish
All you German mothers, I wish the same to you.

My father grew up in Wisconsin, the son of a second generation German mother who sent my father to an after regular school German school. He may have learned the song there. He would sing it to my sister and me.

Jean