Add release dates to Rocky priorities page

Change-Id: Iad2a0bed110557006dda026ec0e670e8405c4255

priorities/rocky-priorities.rst

@@ -6,7 +6,7 @@ Rocky Review Priorities
 
 The Rocky review priorities were discussed at the Dublin PTG and refined
 during the spec review process early in the Rocky cycle.  The preliminary
-list was maintained on the `Rocky PTG etherpad`_.
+list was maintained on the `Rocky PTG priorities etherpad`_.
 
 This list is an estimate of what the Glance project team can accomplish
 during the Rocky cycle based on our developers' estimates of how much
@@ -18,5 +18,52 @@ The following list is roughly in priority order (highest to lowest).
 
 TODO: add priorities
 
-.. _Rocky PTG etherpad: https://etherpad.openstack.org/p/glance-rocky-ptg
+.. _Rocky PTG priorities etherpad: https://etherpad.openstack.org/p/glance-rocky-priorities
 
+
+Important dates
+---------------
+
+This is an abbreviated list focused on dates relevant to Glance.  See
+`Rocky Release Schedule`_ for the complete list for OpenStack.
+
+.. _Rocky Release Schedule: https://releases.openstack.org/rocky/schedule.html
+
+.. list-table::
+   :header-rows: 1
+
+   * - Countdown
+     - Week of
+     - What
+   * - R-19
+     - Apr 16
+     - * **Rocky-1 milestone**
+       * Friday, April 20: Bug scrub
+   * - R-14
+     - May 21
+     - * OpenStack Summit
+   * - R-12
+     - Jun 04
+     - * **Rocky-2 milestone**
+       * **Spec Freeze**
+       * Friday, June 8: Bug scrub
+   * - R-6
+     - Jul 16
+     - * glance_store Rocky release
+   * - R-5
+     - Jul 23
+     - * **Rocky-3 milestone**
+       * glanceclient Rocky release
+       * **Feature Freeze**
+       * Rocky community goals completed
+       * Friday, July 27: Bug scrub
+   * - R-3
+     - Aug 06
+     - * **Glance Release Candidate 1**
+       * String freeze
+   * - R-1
+     - Aug 20
+     - * Final Glance Release Candidates
+   * - R-0
+     - Aug 27
+     - * Glance Rocky Release