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

Other days

youth

Youth Day
bow tie

Bow Tie Day
nae nae

Nae Nae Day
law

Law Day
ride the wind

Ride The Wind Day
stress awareness

Stress Awareness Day
offer

Offer Day
china

China Day
pick me

Pick Me Day
hiv awareness

Hiv Awareness Day