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

Other days

carpenters

Carpenters Day
martini

Martini Day
artists

Artists Day
hannah

Hannah Day
bounce

Bounce Day
my little pony

My Little Pony Day
blanket fort

Blanket Fort Day
believe

Believe Day
healing

Healing Day
hiv awareness

Hiv Awareness Day