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

Other days

self appreciation

Self Appreciation Day
blanket fort

Blanket Fort Day
cat girl

Cat Girl Day
special education

Special Education Day
boyfriend

Boyfriend Day
brow

Brow Day
promposal

Promposal Day
kale

Kale Day
comfy

Comfy Day
ruby

Ruby Day