Bitcoin’s very public scaling debate is entering a crucial phase. Two of the most popular scaling proposals available today — BIP148 and SegWit2x — both intend to trigger Segregated Witness (“SegWit”) activation within a month, which means that the protocol upgrade could be live within two.
At the same time, there is a very real risk that Bitcoin “splits.” Both BIP148 and SegWit2x could diverge from the current Bitcoin protocol, which could in turn lead to even more splits.
Here is a list of dates for July, August and beyond to keep an eye on.
Here's a site that has some more information about the details you talked about:
UASF Guide
Also this site has similar information presented with lots of references:
UASF Working Group
It helps to be prepared! I suggest checking out both.