Dates are formatted yyyy-mm-dd in XML. Date time fields are formatted yyyy-mm-ddTHH:MM:SS. So if you are populating a date field, you'd use a concat formula to put your numbers in, separated by hyphens, like 2020-01-23. If you need a date time, because your field is a date time field, you can use 0s for the time, like 2020-01-23T00:00:00.
Hilary Stoupa
