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

Other days

blanket fort

Blanket Fort Day
one

One Day
reading

Reading Day
bow tie

Bow Tie Day
tulip

Tulip Day
ponytail

Ponytail Day
lisp

Lisp Day
boba

Boba Day
latina equal pay

Latina Equal Pay Day
singles

Singles Day