Oops, it doesn't look like 'simp dumping waifu day' is a national day..

Other days

Prosecco Day

Lumpy Rug Day

Appreciate Yaself A Lil Extra Day

Book Day

Azonto Is Acceptable Day

Tell Ur Crush You Like Them Day

Law Day

Nae Nae Day

Tell A Fairytale Day

Emoji Day