We have a way to do this within the query, but it adds multiple steps. It would be great to be able to use the date set in admin in to trigger an action on the quarter end or start. Just like how you can set to trigger on the first of the month, last of the month, etc
IE transform to add rule date and then be able to say
Criteria:
where rule date = Start of Quarter
OR
where rule date = end of quarter