If you view the policy summary page (click on the policy name ONCE) and then on the right hand side right click the schedule...is there the option to copy? Then target the next policy and paste?
I know you can do this with clients.
BTW this is using the Windows Admin Console.
(Im suggesting this while away from my Admin Console PC however.)
Right-click copy of the schedule does NOT work in the Summary of all Policies view of the Admin Console GUI (Windows)
Click the individual policy and the ability to right-click copy the schedule is now available.
Once copied just go into each other policy and Paste.
All done in the GUI.