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

Other days

bow tie

Bow Tie Day
gum

Gum Day
boy friend

Boy Friend Day
azonto is acceptable

Azonto Is Acceptable Day
me

Me Day
nae nae

Nae Nae Day
nail polish

Nail Polish Day
cuddle up

Cuddle Up Day
lumpy rug

Lumpy Rug Day
tulip

Tulip Day