Key dates The minor version numbers in this table assume there are no unscheduled minors (see above). If an unscheduled minor is released, the dates will not change, but subsequent minor version numbers will be incremented. A release window may be used to release a new Drupal version; however, there is no guarantee that all release windows will be used to release new Drupal versions. In rare cases, a security release may be published outside of the pre-set release windows. In those cases, a public service announcement will be published before the release.