Oops, it doesn't look like 'heroes on the same day' is a national day..

Other days

hannah

Hannah Day
me

Me Day
one

One Day
law

Law Day
prosecco

Prosecco Day
bow tie

Bow Tie Day
self care

Self Care Day
youth

Youth Day
raise awerness of zeus

Raise Awerness Of Zeus Day
lost sock memorial

Lost Sock Memorial Day