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

Other days

african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
brow

Brow Day
carpenters

Carpenters Day
donate your hair

Donate Your Hair Day
believe

Believe Day
hiv awareness

Hiv Awareness Day
ask out your crush

Ask Out Your Crush Day
buddy

Buddy Day
blanket fort

Blanket Fort Day
bow tie

Bow Tie Day