Are we having fun yet?
I have to confess I don't see the problem. Taking rose week as an example, if rose week in February worked well for the past two years, how can moving it to May exclude anyone? We're exchanging information here, not just photos. Even if photos were the focus, however, let's look at the the database images. There are 15,209 rose images. Calif_Sue has contributed 4,071 and I have contributed 4,344. Just the two of us combined, therefore, have contributed more than 55 percent. I'm not even counting the other rose image contributors in our zone, all of whose gardens have roses in bloom by May.
The object of this year's theme is the celebration of plants. ideally, it will be a year to discuss our favorite plants, relate our experiences with them, talk about the best sources, provide planting and growing recommendations, etc. We'll also share photos of plants, but those photos will not have to have been taken on the day we discuss them.
I think surveys and statistical computations will complicate the issue unnecessarily, and we probably will end up with results resembling the current calendar anyway.
