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

Other days

comfy

Comfy Day
one

One Day
azonto is acceptable

Azonto Is Acceptable Day
slime

Slime Day
bounce

Bounce Day
reading

Reading Day
blanket fort

Blanket Fort Day
hiv awareness

Hiv Awareness Day
carpenters

Carpenters Day
cursing

Cursing Day