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

Other days

reading

Reading Day
bow tie

Bow Tie Day
self appreciation

Self Appreciation Day
nail polish

Nail Polish Day
comfy

Comfy Day
buddy

Buddy Day
camera

Camera Day
my little pony

My Little Pony Day
ormille

Ormille Day
lash

Lash Day