Minecraft wiki entry for Timeline_of_events, associated text: 1 – Notch gets back to work 100% on Minecraft after a pause after having left his job at Jalbum a few weeks before.
17 – Minecraft passes 20,000 sales.[14]
18 – Java: Seecret Friday Update 1 released. Minecart system introduced.
25 – Java: Seecret Friday Update 2 released. Dungeons introduced.
30 – Minecraft for Java passes to Alpha development stage (Java Edition Alpha v1.0.0), price raised from 5.00 € to 10.00 €, it is now possible to play on a client window.