A couple of corrections
If it succeeds economically, it will activate SegWit in November.
BIP 148 will activate SegWit by November, not necessarily in November.
The next time when a split is predicted to possibly happen is therefore August 1, 2017 at midnight UTC.
Note that the split will possibly happen when the Median Time Past is after August 1st, so the split would likely happen ~1 hour after midnight UTC as the MTP is usually 1 hour behind real time.
You should also include information about Segwit2x which will activate segwit via BIP 91 and then hard fork 12960 blocks after Segwit is activated.