1st August 2017 - "UASF day" BIP148 trigger date for activating UASF for segwit.

9th August 2017 - Segwit soft fork locks-in, the point of no return when we became sure that bitcoin will have segwit.

23rd August 2017 - Segwit activates and is available for use by anyone.

8th November 2017 - 2X hard fork attempt is abandoned. https://twitter.com/pavolrusnak/status/928386661528035329