Just to clear this up, are we following examples 1, 2, 3, or any of them? I like both 1 and 3. The 2nd seems nice, and I'd imagine overlaying a simple grid over that, so that it won't break the image up too much. Unless someone really wanted to do that, of course. If we want to keep the calendar itself cohesive, perhaps we should limit it to 3 variations every 4 months. So we'd have all 3 variations mix things up, still harmonizing the overall calendar.