Oops, it doesn't look like 'for remainder of the day' is a national day..

Other days

ponytail

Ponytail Day
reading

Reading Day
embarrass your best friend

Embarrass Your Best Friend Day
self appreciation

Self Appreciation Day
mean girls

Mean Girls Day
boy friend

Boy Friend Day
lash

Lash Day
hiv awareness

Hiv Awareness Day
tell a fairytale

Tell A Fairytale Day
my little pony

My Little Pony Day