http://www.pcgamer.com/dayz-is-now-slated-to-leave-early-access-in-2018/

DayZ first came into being way back in 2009 as a mod for Arma 2, and made its standalone debut in 2013 on Steam Early Access. Four years later, it's still there, and it's going to remain in that state until sometime next year. 

"Let's just state the obvious: the PC beta is not coming before the end of 2017. We tried to get it done sooner, but it's going to be 2018 folks," lead producer Eugen Harton wrote in a status report released this week. "Both the beta update and any further 0.63 updates, up to 1.0, will happen in 2018, which is shaping up to be one of the most important years for DayZ. That is as much as we are sure of yet. I'll be honest, it has been a long wait already—even for us—but that's all we got now."