Would it be possible to add options to schedule events relative to other events? e.g. schedule a recurring event to be one week before other event X.
Or to schedule recurring events based on how many weeks before the end of the month?

I have a recurring event that is always on the last Thursday of the month, and a related event that is the Tuesday in the week before. I can schedule an event on the last Thursday, but for the second event I cannot get it to schedule correctly. I can put the third Thursday, but that doesn't work on 5 Thursday months.