When was the alpha version of Minecraft publicly released for PC?

Minecraft is a sandbox independent video game originally created by Swedish programmer Markus "Notch" Persson and later developed and published by the Swedish company Mojang.

The alpha version was publicly released for PC on May 17, 2009, and after gradual updates, the full version was released on November 18, 2011. A version for Android was released a month earlier on October 7, and an iOS version was released on November 17, 2011. The game was released on the Xbox 360 as an Xbox Live Arcade game on May 9, 2012; on the PlayStation 3 on December 17, 2013; on the PlayStation 4 on September 4, 2014; on the Xbox One the next day; and on the PlayStation Vita on October 14, 2014. On December 10, 2014, a Windows Phone version was released. All versions of Minecraft receive periodic updates, with the console editions being co-developed by 4J Studios.