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

Other days

carpenters

Carpenters Day
cuddle up

Cuddle Up Day
donate your hair

Donate Your Hair Day
first love

First Love Day
buddy

Buddy Day
stud

Stud Day
bow tie

Bow Tie Day
cursing

Cursing Day
bounce

Bounce Day
unicorn

Unicorn Day