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

Other days

brow

Brow Day
ask out your crush

Ask Out Your Crush Day
tell a fairytale

Tell A Fairytale Day
emoji

Emoji Day
hiv awareness

Hiv Awareness Day
my little pony

My Little Pony Day
bow tie

Bow Tie Day
singles

Singles Day
lash

Lash Day
kale

Kale Day