I believe Jester King ages their beer on fruit for around 2 months then it's another ~6 weeks of bottle conditioning. For O&P between their Facebook post of the fresh strawberries reaching them and the release it was 14 weeks and 2 days, so at least for this beer the math check out. So judging by their peaches Facebook post on June 29th, I'm going to go and guess the Fen Tao release will be Friday, October 6th.
The release last year was August 23rd, the year before was august 27th. I'm going to guess sometime around there.
I definitely agree w/ @Leftofthedial and @Phoenix2443 on the aging timeframe and looking at last years release schedule. By my research Ive noticed JK likes to try and release the 500ml's around the same time every year. So - late-Aug would be my guess. The whole 14 weeks is a good observation though, so it could release later this year then it did last. I felt like i heard that they e had trouble with peaches in the past and so that couldnt have dictated when they release Fen Tao.