Oops, it doesn't look like 'appreciate down syndrome boyfriend day' is a national day..

Other days

african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
unicorn

Unicorn Day
boy friend

Boy Friend Day
slime

Slime Day
hiv awareness

Hiv Awareness Day
bow tie

Bow Tie Day
hot chocolate

Hot Chocolate Day
frozen yogurt

Frozen Yogurt Day
bounce

Bounce Day
believe

Believe Day