Can you actually do that if your taking some one else's idea and claiming as your own? Things that have been in the public for years. I mean I can't remember the first time I heard it. But the Lego movie made it popular again. I think Deadpool said it in the comics. 
But just in case I'm trade marking
 Mashpotato Monday
 Weiner Wendsay
 Turnip Thursday
 Frog leg Friday
 Sourcrout Saturday
 Stroganoff Sundays