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

Other days

cursing

Cursing Day

blanket fort

Blanket Fort Day

boy friend

Boy Friend Day

self appreciation

Self Appreciation Day

law

Law Day

coffee

Coffee Day

tell ur crush you like them

Tell Ur Crush You Like Them Day

embarrass your best friend

Embarrass Your Best Friend Day

get funky

Get Funky Day

ask out your crush

Ask Out Your Crush Day