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

Other days

kiss a ginger

Kiss A Ginger Day
offer

Offer Day
singles

Singles Day
lisp

Lisp Day
one

One Day
african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
self care

Self Care Day
stress awareness

Stress Awareness Day
ask out your crush

Ask Out Your Crush Day
believe

Believe Day