TimeMachineEditor: Schedule Time Machine Backup On Defined Day & Time http://www.addictivetips.com/mac-os/timemachineeditor-schedule-time-machine-backup-on-defined-day-time/
Change Mac Time Machine Default Backup Time Interval Using TimeMachineScheduler http://www.addictivetips.com/mac-os/change-mac-time-machine-default-backup-time-interval-timemachinescheduler/