Oops, it doesn't look like 'horny flattening the day' is a national day..

Other days

stud

Stud Day
youth

Youth Day
ask out your crush

Ask Out Your Crush Day
nae nae

Nae Nae Day
emoji

Emoji Day
nail polish

Nail Polish Day
azonto is acceptable

Azonto Is Acceptable Day
raise awerness of zeus

Raise Awerness Of Zeus Day
eat what you want

Eat What You Want Day
hannah

Hannah Day