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

Other days

buddy

Buddy Day
one

One Day
tell ur crush you like them

Tell Ur Crush You Like Them Day
stud

Stud Day
boy friend

Boy Friend Day
book

Book Day
cursing

Cursing Day
offer

Offer Day
reading

Reading Day
gum

Gum Day