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

Other days

artists

Artists Day
my little pony

My Little Pony Day
raise awerness of zeus

Raise Awerness Of Zeus Day
gum

Gum Day
lisp

Lisp Day
comfy

Comfy Day
youth

Youth Day
cursing

Cursing Day
book

Book Day
ask out your crush

Ask Out Your Crush Day