Oops, it doesn't look like 'sindi van zyl day' is a national day..

Other days

bounce

Bounce Day
chocolate milkshake

Chocolate Milkshake Day
stress awareness

Stress Awareness Day
boy friend

Boy Friend Day
tell a fairytale

Tell A Fairytale Day
kiss a brunette

Kiss A Brunette Day
martini

Martini Day
prescription drug take back

Prescription Drug Take Back Day
bow tie

Bow Tie Day
embarrass your best friend

Embarrass Your Best Friend Day