I did some research (involving a lot of fast forwarding through most of the episodes) and the initial hack on Allsafe happened around Mr Robot's death — 23rd through 27th February. Episode one seems to be set on 23rd of October (Elliot's phone) but I guess they didn't set the date correctly as it was a pilot episode,…

Did you guys notice it's Mr Robot's birthday in that episode? Check out Angela's computer screen when she's refreshing the web browser, and the tombstone — both say May 9th. Can't believe how much attention they pay to details in that series!