Oops, it doesn't look like 'Bew Goes Sentimental day' is a national day..

Other days

youth

Youth Day
eat what you want

Eat What You Want Day
hoodie

Hoodie Day
stud

Stud Day
book

Book Day
aloxolt

Aloxolt Day
ruby

Ruby Day
cat girl

Cat Girl Day
nail polish

Nail Polish Day
boyfriend

Boyfriend Day