Oops, it doesn't look like 'self hate day' is a national day..

Other days

bow tie

Bow Tie Day
boba

Boba Day
lash

Lash Day
self appreciation

Self Appreciation Day
bounce

Bounce Day
artists

Artists Day
pumpkin

Pumpkin Day
hoodie

Hoodie Day
blanket fort

Blanket Fort Day
pick me

Pick Me Day