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

Other days

Tell Ur Crush You Like Them Day

Law Day

African Immigrant And Refugee Hiv And Hep Awareness Day

Prosecco Day

Believe Day

Kiss A Ginger Day

One Day

Tulip Day

Appreciate Yaself A Lil Extra Day

Aloxolt Day