POTM contests are held monthly. From the 1st of the month until 7 days before the first of the next month, the submissions are open in the Showoff/Photography forum. 7 days from the first of the next month, voting occors in the Site Polls forum. Winners are announced in this forum on the first of the new month.
"What, exactly, is the internet? Basically it is a global network exchanging digitized data in such a way that any computer, anywhere, that is equipped with a device called a 'modem', can make a noise like a duck choking on a kazoo." - Dave Barry