Oops, it doesn't look like 'wake up billie joe armstrong day' is a national day..

Other days

slime

Slime Day
fiancee

Fiancee Day
boba

Boba Day
coffee

Coffee Day
singles

Singles Day
youth

Youth Day
artists

Artists Day
cursing

Cursing Day
pampering

Pampering Day
hoodie

Hoodie Day