Equallogic replication schedules

PS6000s Firmware 6.0.5

I have hourly replication setup for each of my volumes to our offsite PS6000s 7 days a week.

I would like to have a different replication schedule for a specific day of the week, like Sunday. Hourly every day of the week except Sunday, on Sunday replicate every 6 hours. I don't see it as being an option in the GUI and was wondering if this was possible some other way without manually editing the schedule every week.