private DateTime parseTime(TextBox field)
        {
            DateTime date    = this.dateTimePickerStartDate.Value;
            int      hours   = 0;
            int      minutes = 0;

            if (!KopsikApi.kopsik_parse_time(field.Text, ref hours, ref minutes))
            {
                return(date);
            }

            return(date.Date + new TimeSpan(hours, minutes, 0));
        }