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

Other days

ponytail

Ponytail Day
lisp

Lisp Day
blanket fort

Blanket Fort Day
ruby

Ruby Day
gum

Gum Day
self care

Self Care Day
donate your hair

Donate Your Hair Day
me

Me Day
slime

Slime Day
latina equal pay

Latina Equal Pay Day