Ubuntu 12.04 hasn't been released yet, but Canonical is already planning Ubuntu 12.10 and an initial release schedule draft has been published on the Ubuntu wiki.
Ubuntu 12.10 (
the "Q" code name hasn't been announced yet) Quantal Quetzal will have 3 alpha versions, 2 betas and just like Precise, no release candidate. Here's the Ubuntu 12.10 release schedule:
- Alpha 1 - June 7th
- Alpha 2 - June 28th
- Alpha 3 - July 26th
- Beta 1 - September 6th
- Beta 2 - September 27th
- Final Ubuntu 12.10 release - October 18th
July update: the Alpha 3 release date has changed from August 2nd to July 26th.