Oops, it doesn't look like 'stfu and get off my lawn day' is a national day..

Other days

fiancee

Fiancee Day

self appreciation

Self Appreciation Day

kale

Kale Day

nail polish

Nail Polish Day

bounce

Bounce Day

blanket fort

Blanket Fort Day

self care

Self Care Day

get funky

Get Funky Day

cat girl

Cat Girl Day

ride the wind

Ride The Wind Day