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

Other days

lost sock memorial

Lost Sock Memorial Day
bow tie

Bow Tie Day
mean girls

Mean Girls Day
self appreciation

Self Appreciation Day
kale

Kale Day
ormille

Ormille Day
boba

Boba Day
gum

Gum Day
pumpkin

Pumpkin Day
brow

Brow Day