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

Other days

cursing

Cursing Day
one

One Day
nae nae

Nae Nae Day
eat what you want

Eat What You Want Day
my little pony

My Little Pony Day
buddy

Buddy Day
offer

Offer Day
promposal

Promposal Day
carpenters

Carpenters Day
blanket fort

Blanket Fort Day