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

Other days

ask out your crush

Ask Out Your Crush Day
special education

Special Education Day
lisp

Lisp Day
african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
singles

Singles Day
hiv awareness

Hiv Awareness Day
coffee

Coffee Day
bow tie

Bow Tie Day
donate your hair

Donate Your Hair Day
hot chocolate

Hot Chocolate Day