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

Other days

ponytail

Ponytail Day
slime

Slime Day
china

China Day
tulip

Tulip Day
self care

Self Care Day
kiss a ginger

Kiss A Ginger Day
stud

Stud Day
lash

Lash Day
carpenters

Carpenters Day
kale

Kale Day