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

Other days

lisp

Lisp Day
singles

Singles Day
tell a fairytale

Tell A Fairytale Day
camera

Camera Day
girl friend

Girl Friend Day
bow tie

Bow Tie Day
boy friend

Boy Friend Day
bounce

Bounce Day
aloxolt

Aloxolt Day
ruby

Ruby Day