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

Other days

self appreciation

Self Appreciation Day
carpenters

Carpenters Day
kiss a brunette

Kiss A Brunette Day
unicorn

Unicorn Day
ruby

Ruby Day
get funky

Get Funky Day
bonang

Bonang Day
blanket fort

Blanket Fort Day
comfy

Comfy Day
martini

Martini Day