Add recipient time zone scheduling to deliveries using recipient's location or explicit preference, e.g. nms:recipient/@timeZone.
Deliveries gain another enumerated value in their scheduling time zone dropdown: Recipient time zone
When applied, deliveries will stagger sending across target population's timezones. so that everyone gets their emails at the same time on their clocks. E.g. Hawaii and New York recipients will all get their emails at 8 AM.