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

Other days

gum

Gum Day

stress awareness

Stress Awareness Day

hiv awareness

Hiv Awareness Day

kale

Kale Day

believe

Believe Day

my little pony

My Little Pony Day

boy friend

Boy Friend Day

Emoji Day

self appreciation

Self Appreciation Day

prosecco

Prosecco Day