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

Other days

unicorn

Unicorn Day
hoodie

Hoodie Day
carpenters

Carpenters Day
brow

Brow Day
aloxolt

Aloxolt Day
bow tie

Bow Tie Day
azonto is acceptable

Azonto Is Acceptable Day
pampering

Pampering Day
self care

Self Care Day
promposal

Promposal Day