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

Other days

tulip

Tulip Day
self appreciation

Self Appreciation Day
cat girl

Cat Girl Day
kale

Kale Day
ormille

Ormille Day
ruby

Ruby Day
ask out your crush

Ask Out Your Crush Day
believe

Believe Day
comfy

Comfy Day
unicorn

Unicorn Day