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

Other days

kiss a ginger

Kiss A Ginger Day
self appreciation

Self Appreciation Day
bounce

Bounce Day
kale

Kale Day
unicorn

Unicorn Day
stud

Stud Day
gum

Gum Day
nail polish

Nail Polish Day
hannah

Hannah Day
promposal

Promposal Day