found here:
https://www.reddit.com/r/Bitcoin/comments/6nlhbo/know_your_bitcoin_hard_forks/

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"July 21 — Segwit2x is due to be released and "...."
July 23 — BIP91 should lock in (requires 80% of 336 blocks to signal)
July 26 — BIP91 should activate. At this point, all blocks are required to signal for Segwit (BIP141) or they will be orphaned off the network."
found here:
https://medium.com/@jimmysong/segwit2x-what-you-need-to-know-about-the-2mb-hard-fork-27749e1544ce
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found here:
https://bitcoinmagazine.com/articles/countdown-segwit-these-are-dates-keep-eye/