JSM Change Calendar -- possible to filter/display Freeze Windows or Maintenance Windows in results?

Using JSM, I’m able to create and display Change requests (issuetype = “[System] Change”) with no trouble. However, we also left-click on the JSM Change Calendar to document change windows (for freezes or maintenance). They display OK while on the Change Calendar, but they don’t appear on Change-based filter results. I can’t find where those entries exist in the Jira/JSM database to filter/report on them.

Does anyone know how/where I can access those entries using a filter for display on filter results? Filtering actual Change requests is easy – it’s the Change “Windows” that are a mystery. Silly they would appear/exist only within the confines of a visible Change Calendar. The data has to be in JSM somewhere.

Thanks in advance!