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

Other days

gum

Gum Day
camera

Camera Day
kale

Kale Day
carpenters

Carpenters Day
unicorn

Unicorn Day
latina equal pay

Latina Equal Pay Day
bow tie

Bow Tie Day
bounce

Bounce Day
first love

First Love Day
lumpy rug

Lumpy Rug Day