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

Other days

tell a fairytale

Tell A Fairytale Day
ask out your crush

Ask Out Your Crush Day
self appreciation

Self Appreciation Day
azonto is acceptable

Azonto Is Acceptable Day
fiancee

Fiancee Day
youth

Youth Day
lash

Lash Day
ponytail

Ponytail Day
first love

First Love Day
kiss a ginger

Kiss A Ginger Day