By this date, all features with updates to be landed in `main` for the release must be named and acked by the [[http://launchpad.net/~ubuntu-release|ReleaseTeam]]. Having this freeze gives them a chance to identify any features which should be subject to an earlier PartnerUploadDeadline or FeatureFreeze deadline because they are especially risky. The list of features should be sent to the [[https://lists.ubuntu.com/mailman/listinfo/ubuntu-release|Release Team mailing list]].