It does not seem to be possible. Doc B has set up this Reading Plan for Calvin's Institutes to start on Monday, Jan 5. But what if I want to start reading it now? I can't. (Well, sure, I could just start reading today, but I couldn't do it in conjunction with the days on the Reading Plan.) There is no Edit button on this because it is a Collaborated reading plan so only the creator can edit it.
I suggest that Reading Plans should be able to be shared (so that you can save others the massive amount of work setting them up) but let people edit the start date on their copy to start them whenever they want.
