As Bitcoin’s scaling dispute appears to be heading for a climax, the next couple of weeks could prove pivotal. One scaling solution in particular, Bitcoin Improvement Proposal 148 (“BIP 148”), is scheduled to trigger activation of Segregated Witness (SegWit) on August 1, 00:00 UTC. As a User Activated Soft Fork (UASF), all users that run a BIP 148 node will then start rejecting any and all blocks that do not signal support for SegWit by the “deadline” — or, perhaps more accurately, “ultimatum” — set by BIP 148 users.
https://bitcoinmagazine.com/articles/bi ... -deadline/