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

Other days

unicorn

Unicorn Day

lumpy rug

Lumpy Rug Day

african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day

coffee

Coffee Day

Me Day

lisp

Lisp Day

lost sock memorial

Lost Sock Memorial Day

stress awareness

Stress Awareness Day

special education

Special Education Day

my little pony

My Little Pony Day