Oops, it doesn't look like 'parks starting on veterans day' is a national day..

Other days

reading

Reading Day
ponytail

Ponytail Day
kale

Kale Day
brow

Brow Day
self care

Self Care Day
law

Law Day
bow tie

Bow Tie Day
tulip

Tulip Day
first love

First Love Day
slime

Slime Day