Oops, it doesn't look like 'Pain In The Ass day' is a national day..

Other days

promposal

Promposal Day
bow tie

Bow Tie Day
pick me

Pick Me Day
singles

Singles Day
lumpy rug

Lumpy Rug Day
prosecco

Prosecco Day
blanket fort

Blanket Fort Day
self care

Self Care Day
kiss a ginger

Kiss A Ginger Day
self appreciation

Self Appreciation Day