That's what I call a nice graphic , Clean & awesome
It explain basically all the big actions that happened on Bitcoin world , a lot of them I didn't know that It happened to be honest since I'am new to Bitcoin.
Who ever made that graphic did a good work , but he may wanna add some things that happened like Twitch accepting Bitcoin , Bitsmap hacked etc ...
btw the halving time should happen sometime in 2016 July , the graph says 2017 which one is correct ?