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

Other days

hot chocolate

Hot Chocolate Day
girl friend

Girl Friend Day
cuddle up

Cuddle Up Day
boba

Boba Day
kiss a ginger

Kiss A Ginger Day
brow

Brow Day
first love

First Love Day
nail polish

Nail Polish Day
bow tie

Bow Tie Day
prosecco

Prosecco Day