Maybe the answer to this is obvious, but I wasn’t able to find it by searching the UI, FAQ and forum.
I started a new year’s resolution on the first of the month, and joined Beeminder only yesterday, converting that resolution to an auto-summing goal. It looks like by default, the goal begins on the date you create it. If possible, I’d like to make my goal “backdate” to the first of the month, since it’s a cumulative per year type of goal. Is it possible to set the start date for a per/year goal?