Posting expressions you tried would help to see what the variable/field names are, plus it would provide a starting point seeing as how this isn't quite simple. Also, 1 or 2 other examples would help to ensure the desired results. F'rinstance, if the date was 01/28/2020 should the result be 02/15/2020?
EDIT - maybe it's simpler than I first imagined. Playing with date functions now.
The more we hear silence, the more we begin to think about our value in this universe.
Paraphrase of Professor Brian Cox.