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

Other days

tulip

Tulip Day
gallery

Gallery Day
singles

Singles Day
youth

Youth Day
tell a fairytale

Tell A Fairytale Day
mean girls

Mean Girls Day
lumpy rug

Lumpy Rug Day
slime

Slime Day
my little pony

My Little Pony Day
lash

Lash Day