Oops, it doesn't look like 'bird dies of lead poisoning on same day' is a national day..

Other days

Aloxolt Day

Cuddle Up Day

Blanket Fort Day

Unicorn Day

Kiss A Ginger Day

Cursing Day

Boyfriend Day

African Immigrant And Refugee Hiv And Hep Awareness Day

Tulip Day

Appreciate Yaself A Lil Extra Day