When on the Golarion calendar (year and month) does this adventure path begin?
Other than the info that the Guide to Korvosa gives, that the current year is 4708, there is no particular month given or really indicated. Some of the later adventures give references to what you should do depending on the season your players wind up in the Cinderlands, but no specific dates that I can recall anywhere.
The idea is that the AP begins in 4708 the same month-equivalent as when when the AP started shipping. Which was... February?
When on the Golarion calendar (year and month) does this adventure path begin?
I started it in the equivalent of May and they seemed to more or less keep in time to the random mentions of the time of year in the AP.