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

Other days

ruby

Ruby Day
embarrass your best friend

Embarrass Your Best Friend Day
tulip

Tulip Day
lost sock memorial

Lost Sock Memorial Day
azonto is acceptable

Azonto Is Acceptable Day
promposal

Promposal Day
frozen yogurt

Frozen Yogurt Day
self appreciation

Self Appreciation Day
lumpy rug

Lumpy Rug Day
artists

Artists Day