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

Other days

gum

Gum Day
camera

Camera Day
fiancee

Fiancee Day
youth

Youth Day
bow tie

Bow Tie Day
carpenters

Carpenters Day
ask out your crush

Ask Out Your Crush Day
nae nae

Nae Nae Day
tulip

Tulip Day
hiv awareness

Hiv Awareness Day