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

Other days

youth

Youth Day
kale

Kale Day
kiss a ginger

Kiss A Ginger Day
singles

Singles Day
african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
frozen yogurt

Frozen Yogurt Day
offer

Offer Day
azonto is acceptable

Azonto Is Acceptable Day
bow tie

Bow Tie Day
lost sock memorial

Lost Sock Memorial Day