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

Other days

raise awerness of zeus

Raise Awerness Of Zeus Day
brow

Brow Day
coffee

Coffee Day
gum

Gum Day
bow tie

Bow Tie Day
pumpkin

Pumpkin Day
boy friend

Boy Friend Day
youth

Youth Day
cuddle up

Cuddle Up Day
hiv awareness

Hiv Awareness Day