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

Other days

carpenters

Carpenters Day
self appreciation

Self Appreciation Day
martini

Martini Day
bow tie

Bow Tie Day
boba

Boba Day
singles

Singles Day
slime

Slime Day
gum

Gum Day
kale

Kale Day
hoodie

Hoodie Day