Tom, it seems like those stickers were good for 13, 14, or 15 months because the alternative for someone scrambling to get a sticker for the first time in November or December 2009 in those zones would have been to buy one that was good for just 2 or 3 months (not 12 like the renewal).
If they were nice, they'd stick to a similar policy in general - moving to Somerville you would pay full price for a partial year, but at some point instead of getting shafted by a sticker that's only good for 1 month or 2 months they can sell you the next year's sticker good for slightly over a year. Perhaps, when they have the stickers ready to start processing renewals, which I know they have before the month in question.
I renewed my sticker when I got the form in the mail in December, and I'm in Zone 1/January 31 expiration. I got the new sticker late December.
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If they were nice, they'd stick to a similar policy in general - moving to Somerville you would pay full price for a partial year, but at some point instead of getting shafted by a sticker that's only good for 1 month or 2 months they can sell you the next year's sticker good for slightly over a year. Perhaps, when they have the stickers ready to start processing renewals, which I know they have before the month in question.
I renewed my sticker when I got the form in the mail in December, and I'm in Zone 1/January 31 expiration. I got the new sticker late December.