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

Other days

gum

Gum Day
african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
stress awareness

Stress Awareness Day
ask out your crush

Ask Out Your Crush Day
hannah

Hannah Day
cuddle up

Cuddle Up Day
singles

Singles Day
kiss a ginger

Kiss A Ginger Day
brow

Brow Day
azonto is acceptable

Azonto Is Acceptable Day