Oops, it doesn't look like 'monument campus groundbreaking ceremony held on labor day' is a national day..

Other days

camera

Camera Day
hiv awareness

Hiv Awareness Day
ask out your crush

Ask Out Your Crush Day
singles

Singles Day
hannah

Hannah Day
slime

Slime Day
cuddle up

Cuddle Up Day
frozen yogurt

Frozen Yogurt Day
tell ur crush you like them

Tell Ur Crush You Like Them Day
tell a fairytale

Tell A Fairytale Day