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

Other days

offer

Offer Day
tulip

Tulip Day
cursing

Cursing Day
ormille

Ormille Day
bounce

Bounce Day
lost sock memorial

Lost Sock Memorial Day
gum

Gum Day
azonto is acceptable

Azonto Is Acceptable Day
believe

Believe Day
ruby

Ruby Day