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

Other days

camera

Camera Day
ruby

Ruby Day
tell ur crush you like them

Tell Ur Crush You Like Them Day
comfy

Comfy Day
stress awareness

Stress Awareness Day
me

Me Day
bow tie

Bow Tie Day
azonto is acceptable

Azonto Is Acceptable Day
ride the wind

Ride The Wind Day
pampering

Pampering Day