Adding Jazzy Jalisco Timeline (#3760) (#3798)

* Adding Jazzy Jalisco timeline

Signed-off-by: Marco A. Gutierrez <[email protected]>
Co-authored-by: Chris Lalancette <[email protected]>
(cherry picked from commit bebe6b9)

Co-authored-by: Marco A. Gutierrez <[email protected]>

source/Releases/Release-Jazzy-Jalisco.rst

@@ -2,8 +2,8 @@
 
 .. _jazzy-release:
 
-Jazzy Jalisco (codename 'jazzy'; May, 2024)
-===========================================
+Jazzy Jalisco (``jazzy``)
+=========================
 
 .. contents:: Table of Contents
    :depth: 2
@@ -45,3 +45,52 @@ Development progress
 For progress on the development of Jazzy Jalisco, see `this project board <https://github.com/orgs/ros2/projects/52>`__.
 
 For the broad process followed by Jazzy Jalisco, see the :doc:`process description page <Release-Process>`.
+
+Known Issues
+------------
+
+To come.
+
+Release Timeline
+----------------
+
+    November, 2023 - Platform decisions
+        REP 2000 is updated with the target platforms and major dependency versions.
+
+    By January, 2024 - Rolling platform shift
+        Build farm is updated with the new platform versions and dependency versions for Jazzy Jalisco.
+
+    Mon. April 8, 2024 - Alpha + RMW freeze
+        Preliminary testing and stabilization of ROS Base [1]_ packages, and API and feature freeze for RMW provider packages.
+
+    Mon. April 15, 2024 - Freeze
+        API and feature freeze for ROS Base [1]_ packages in Rolling Ridley.
+        Only bug fix releases should be made after this point.
+        New packages can be released independently.
+
+    Mon. April 22, 2024 - Branch
+        Branch from Rolling Ridley.
+        ``rosdistro`` is reopened for Rolling PRs for ROS Base [1]_ packages.
+        Jazzy development shifts from ``ros-rolling-*`` packages to ``ros-jazzy-*`` packages.
+
+    Mon. April 29, 2024 - Beta
+        Updated releases of ROS Desktop [2]_ packages available.
+        Call for general testing.
+
+    Wed, May 1, 2024 - Kick off of Tutorial Party
+        Tutorials hosted at https://github.com/osrf/ros2_test_cases are open for community testing.
+
+    Mon. May 13, 2024 - Release Candidate
+        Release Candidate packages are built.
+        Updated releases of ROS Desktop [2]_ packages available.
+
+    Mon. May 20, 2024 - Distro Freeze
+        Freeze rosdistro.
+        No PRs for Jazzy on the ``rosdistro`` repo will be merged (reopens after the release announcement).
+
+    Thu. May 23, 2024 - General Availability
+        Release announcement.
+        ``rosdistro`` is reopened for Jazzy PRs.
+
+.. [1] The ``ros_base`` variant is described in `REP 2001 (ros-base) <https://www.ros.org/reps/rep-2001.html#ros-base>`_.
+.. [2] The ``desktop`` variant is described in `REP 2001 (desktop-variants) <https://www.ros.org/reps/rep-2001.html#desktop-variants>`_.