Ubuntu Release Manager, Kate Stewart has announced on the ubuntu-devel mailing list that Ubuntu 11.04 will not see a Release Candidate release.
The RC, originally scheduled for April 21, will be replaced with a second beta release on April 14.
The decision was based on the feeling "..that a release candidate …showing up just before the Easter holiday would be a bit late."
Continuing, Kate Stewart said: "After discussing this with the key stakeholders and not getting any negative feedback from them or in the weekly release meetings, we’re going to go ahead and add a Beta 2 for this release, and drop the Release Candidate from the Natty Schedule."
So, here is the new release schedule:-