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

Other days

ruby

Ruby Day
gum

Gum Day
bounce

Bounce Day
self appreciation

Self Appreciation Day
get funky

Get Funky Day
stress awareness

Stress Awareness Day
carpenters

Carpenters Day
comfy

Comfy Day
promposal

Promposal Day
cursing

Cursing Day