Oops, it doesn't look like 'letters of intent at our signing day' is a national day..

Other days

gum

Gum Day
kiss a brunette

Kiss A Brunette Day
kiss a ginger

Kiss A Ginger Day
donate your hair

Donate Your Hair Day
artists

Artists Day
african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
boy friend

Boy Friend Day
me

Me Day
polyamory

Polyamory Day
special education

Special Education Day