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

Other days

boba

Boba Day
hoodie

Hoodie Day
kiss a ginger

Kiss A Ginger Day
lash

Lash Day
hiv awareness

Hiv Awareness Day
pick me

Pick Me Day
blanket fort

Blanket Fort Day
get funky

Get Funky Day
brow

Brow Day
tulip

Tulip Day