I wouldn't sweat it Humayun, life is too short... so is time. I TRY to meet the challenge, but often the month just flies past and thereisn't time to put your ideas into pixels. The rules are that you can enter from you "back catalogue" if you have to and often you might have just the shot that fits the topic.
I for one look forward to seeing what interpretation that people apply to the topic, no matter how old the photons are
