Oops, it doesn't look like 'league final day' is a national day..

Other days

law

Law Day
slime

Slime Day
kiss a ginger

Kiss A Ginger Day
brow

Brow Day
bow tie

Bow Tie Day
tulip

Tulip Day
boy friend

Boy Friend Day
chocolate milkshake

Chocolate Milkshake Day
ormille

Ormille Day
martini

Martini Day