Oops, it doesn't look like 'park cascades on a beautiful day' is a national day..

Other days

Tell Ur Crush You Like Them Day

Fiancee Day

Bow Tie Day

Cursing Day

Eat What You Want Day

Aloxolt Day

Ormille Day

Stud Day

Appreciate Yaself A Lil Extra Day

Lumpy Rug Day