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

Other days

ruby

Ruby Day
slime

Slime Day
hannah

Hannah Day
blanket fort

Blanket Fort Day
self care

Self Care Day
promposal

Promposal Day
kale

Kale Day
cat girl

Cat Girl Day
boy friend

Boy Friend Day
lumpy rug

Lumpy Rug Day