Curious

Snapped this from the top of a no 16 bus leaving Elm Row - I also got a close-up of the piece of white paper which, although a poor shot, just rendered the writing legible. It says:
"What did I do, think, feel yesterday?
My 365days photo diary
in 2013."

Is there a blipper in the bookshop? What does it mean? I think we should be told.