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

Other days

unicorn

Unicorn Day

blanket fort

Blanket Fort Day

buddy

Buddy Day

boba

Boba Day

african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day

offer

Offer Day

ponytail

Ponytail Day

martini

Martini Day

one

One Day

tell a fairytale

Tell A Fairytale Day