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

Other days

boba

Boba Day
book

Book Day
bounce

Bounce Day
self appreciation

Self Appreciation Day
artists

Artists Day
ruby

Ruby Day
gum

Gum Day
promposal

Promposal Day
get funky

Get Funky Day
tulip

Tulip Day