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

Other days

lumpy rug

Lumpy Rug Day
boba

Boba Day
latina equal pay

Latina Equal Pay Day
nae nae

Nae Nae Day
blanket fort

Blanket Fort Day
lash

Lash Day
brow

Brow Day
cat girl

Cat Girl Day
hoodie

Hoodie Day
slime

Slime Day