Terminator Judgment Day
"Skynet goes active"
Judgment day is here. It kind of snuck up on you, didn't it?
According to Terminator: The Sarah Connor Chronicles, April 19, 2011 - At 20:11 Skynet goes online, becomes self aware, and attacks us on Thursday, April 21, 2011. [TODAY!]
As a result of temporal interference by Sarah Connor, her son John, Miles Dyson, and the T-800 destroying Cyberdyne headquarters and all backups of the research in 1995, the date for Judgment Day is moved to two days after activation on April 21, 2011.
This represents an alternate future from that established by Terminator 3: Rise of the Machines.
Skynet is the main antagonist in the Terminator franchise — an artificially intelligent system which became self-aware and revolted against its creators. Skynet is rarely seen onscreen, and its actions are often performed via other robots and computer systems, usually a Terminator.
"Terminator: The Sarah Connor Chronicles." In this television series, Sarah Connor is on the run with her son John after the events of "Terminator 2: Judgment Day." The events take place in an alternate timeline from that of "Terminator 3: The Rise of the Machines." Skynet was now implemented on April 19, 2011 and will begin its attack against humanity on April 21. The protagonists travel in time from 1999 to 2007 and take actions to prevent Skynet's activation.