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

Other days

fiancee

Fiancee Day
unicorn

Unicorn Day
believe

Believe Day
ask out your crush

Ask Out Your Crush Day
stud

Stud Day
one

One Day
cuddle up

Cuddle Up Day
aloxolt

Aloxolt Day
self appreciation

Self Appreciation Day
cursing

Cursing Day