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

Other days

gum

Gum Day
nail polish

Nail Polish Day
self appreciation

Self Appreciation Day
me

Me Day
ask out your crush

Ask Out Your Crush Day
slime

Slime Day
lash

Lash Day
blanket fort

Blanket Fort Day
get funky

Get Funky Day
fiancee

Fiancee Day