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

Other days

lisp

Lisp Day
appreciate yaself a lil extra

Appreciate Yaself A Lil Extra Day
china

China Day
bonang

Bonang Day
ruby

Ruby Day
gum

Gum Day
get funky

Get Funky Day
self care

Self Care Day
nae nae

Nae Nae Day
lash

Lash Day