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

Other days

ride the wind

Ride The Wind Day
bow tie

Bow Tie Day
lisp

Lisp Day
nae nae

Nae Nae Day
coffee

Coffee Day
pampering

Pampering Day
lumpy rug

Lumpy Rug Day
ask out your crush

Ask Out Your Crush Day
china

China Day
self care

Self Care Day