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

Other days

promposal

Promposal Day
cursing

Cursing Day
stud

Stud Day
bonang

Bonang Day
slime

Slime Day
boy friend

Boy Friend Day
bounce

Bounce Day
azonto is acceptable

Azonto Is Acceptable Day
get funky

Get Funky Day
brow

Brow Day