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

Other days

ormille

Ormille Day
singles

Singles Day
promposal

Promposal Day
stud

Stud Day
azonto is acceptable

Azonto Is Acceptable Day
bow tie

Bow Tie Day
aloxolt

Aloxolt Day
youth

Youth Day
ruby

Ruby Day
pick me

Pick Me Day