It would be very helpful if emails not only could be scheduled on a later date, but also on a recurring basis. 

For example, rather than manually scheduling these copied messages to birthdays each day, week, or, month, why not add a field that would allow a campaign like this to be repeated with the dynamic query each day, week, month??

Seems like a pretty standard practice at other email platforms. Not sure if this has already been discussed or is planned in future updates. I didn't see anything.