def sepdate(dt):
        """sepdate('%m/%d/%y %H:%M:%S') -> '%Y-%m-%d'

Return ISO-format yyyy-mm-dd date from Access-formatted Date/Time."""
        dt = "%s" % dt
        if dt.find(" ") != -1:
                datepart, timepart =  dt.split(" ")
        else:
                return None
        month, day, year = datepart.split("/")
        if int(year) <= 29:
                year = '20' + year # make same assumptions about 2-digit
        elif int(year) <= 99:
                year = '19' + year # years as Access' Short Date format
        return year + "-" + month + "-" + day