Oops, it doesn't look like 'give no fucks day' is a national day..

Other days

fiancee

Fiancee Day
boba

Boba Day
ormille

Ormille Day
reading

Reading Day
youth

Youth Day
lash

Lash Day
offer

Offer Day
cuddle up

Cuddle Up Day
kiss a ginger

Kiss A Ginger Day
one

One Day