Add weekly call routing schedule for phone numbers (on Call) and/or dial plans

Please add the ability to schedule phone number and/or dial plan routing based on a schedule. This could be a round robin schedule or a begin date schedule. We manually change the On  Call number routing weekly. We have a schedule to identify who takes calls from the on call phone number and the rotation is weekly. The schedule is round robin with some exceptions to the schedule for Holiday coverage. For simplicity, it might be easiest to enter the weekly schedule. Not so sure an end date would be required. The previously scheduled route would end when the next schedule date/time starts. We also use dial plans for each user that participates in the on call schedule. Not sure how simple or difficult it would be to modify the user called in the dial plan or attach the schedule to the dial plan as opposed to the phone route. Either way works for us as long as a schedule can be identified and it changes the phone routing on a weekly/start date basis per the identified schedule.