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

Other days

slime

Slime Day
ask out your crush

Ask Out Your Crush Day
self appreciation

Self Appreciation Day
bubble bath

Bubble Bath Day
self care

Self Care Day
blanket fort

Blanket Fort Day
ruby

Ruby Day
first love

First Love Day
offer

Offer Day
promposal

Promposal Day