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

Other days

boy friend

Boy Friend Day
brow

Brow Day
prosecco

Prosecco Day
aloxolt

Aloxolt Day
latina equal pay

Latina Equal Pay Day
carpenters

Carpenters Day
tulip

Tulip Day
law

Law Day
bonang

Bonang Day
blanket fort

Blanket Fort Day