I think there is something in the coerce library that already does this?  I feel like if this function was necessary I'd have already had to write it by now because I'm putting date/time fields in the output of the reports/events in a lot of other places.  I think it might just be `to-string`?

If this function does turn out to be necessary then I'd probably recommend putting it `utils`, or somewhere else more re-usable.