Oops, it doesn't look like 'mourning in bangladesh one day' is a national day..

Other days

brow

Brow Day
one

One Day
tell ur crush you like them

Tell Ur Crush You Like Them Day
lash

Lash Day
me

Me Day
cuddle up

Cuddle Up Day
tulip

Tulip Day
ask out your crush

Ask Out Your Crush Day
blanket fort

Blanket Fort Day
bonang

Bonang Day