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

Other days

martini

Martini Day
ride the wind

Ride The Wind Day
get funky

Get Funky Day
special education

Special Education Day
cuddle up

Cuddle Up Day
first love

First Love Day
african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
self appreciation

Self Appreciation Day
reading

Reading Day
stress awareness

Stress Awareness Day