Hi Barb! Fancy meeting you here.
The trick, I suspect, is to add valueformat= in textmode that suits the style your needs. For dates, here are some options to try (one at a time):
valueformat= atDate valueformat= atDateWithOutTime valueformat= mediumAtDate valueformat= longAtDate valueformat= fullAtDate valueformat= longDayAtDate valueformat= partialAtDate valueformat= atDateAsTimestamp
Regards,
Doug