Oops, it doesn't look like 'lets hate nath day' is a national day..

Other days

boba

Boba Day
comfy

Comfy Day
buddy

Buddy Day
kale

Kale Day
bounce

Bounce Day
youth

Youth Day
ruby

Ruby Day
blanket fort

Blanket Fort Day
promposal

Promposal Day
carpenters

Carpenters Day