Oops, it doesn't look like 'registration form on the last day' is a national day..

Other days

kale

Kale Day
lumpy rug

Lumpy Rug Day
boy friend

Boy Friend Day
frozen yogurt

Frozen Yogurt Day
one

One Day
boyfriend

Boyfriend Day
self appreciation

Self Appreciation Day
gum

Gum Day
girl friend

Girl Friend Day
self care

Self Care Day