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

Other days

tulip

Tulip Day
hiv awareness

Hiv Awareness Day
artists

Artists Day
cuddle up

Cuddle Up Day
slime

Slime Day
believe

Believe Day
self appreciation

Self Appreciation Day
boba

Boba Day
ormille

Ormille Day
ruby

Ruby Day