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

Other days

boba

Boba Day
carpenters

Carpenters Day
singles

Singles Day
gum

Gum Day
bow tie

Bow Tie Day
latina equal pay

Latina Equal Pay Day
self care

Self Care Day
stud

Stud Day
coffee

Coffee Day
slime

Slime Day