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

Other days

bonang

Bonang Day
kiss a ginger

Kiss A Ginger Day
gum

Gum Day
slime

Slime Day
lost sock memorial

Lost Sock Memorial Day
aloxolt

Aloxolt Day
ruby

Ruby Day
pick me

Pick Me Day
hoodie

Hoodie Day
believe

Believe Day