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

Other days

hoodie

Hoodie Day
law

Law Day
lash

Lash Day
self appreciation

Self Appreciation Day
chocolate milkshake

Chocolate Milkshake Day
african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
stress awareness

Stress Awareness Day
artists

Artists Day
one

One Day
get funky

Get Funky Day