The only way to currently do that is by using IFTTT
I would create a schedule that has all your zones set to run one minute, then disable the schedule. You can then create a IFTTT recipe that triggers this schedule on a certain time interval.
This is a sample recipe that shows running a schedule every hour.
If you want even more sophistication you can use Google Calendar in IFTTT.
We are working on new calendaring that will support multiple daily run times and many more requested features. but won’t be available for some time.