How to use the react-dates.isSameDay function in react-dates

const timeSlotEqualsDay = (timeSlot, day) => {
  if (ensureTimeSlot(timeSlot).attributes.type === TIME_SLOT_DAY) {
    // Time slots describe available dates by providing a start and
    // an end date which is the following day. In the single date picker
    // the start date is used to represent available dates.
    const localStartDate = dateFromAPIToLocalNoon(timeSlot.attributes.start);

    return isSameDay(day, moment(localStartDate));
  } else {
    return false;
  }
};

const timeSlotEqualsDay = (timeSlot, day) => {
  // Time slots describe available dates by providing a start and
  // an end date which is the following day. In the single date picker
  // the start date is used to represent available dates.
  const localStartDate = dateFromAPIToLocalNoon(timeSlot.attributes.start);

  const isDay = ensureTimeSlot(timeSlot).attributes.type === TIME_SLOT_DAY;
  return isDay && isSameDay(day, moment(localStartDate));
};

const isInclusivelyAfterDayResult: boolean = isInclusivelyAfterDay(moment(),moment());
const isInclusivelyBeforeDayResult: boolean = isInclusivelyBeforeDay(moment(),moment());
const isNextDayDayResult: boolean = isNextDay(moment(),moment());
const isSameDayResult: boolean = isSameDay(moment(),moment());
const toISODateStringResult: string | null = toISODateString(moment(), "dd.mm.yyyy");
const toLocalizedDateStringResult: string | null = toLocalizedDateString(moment(), "dd.mm.yyyy");
const toMomentObjectResult: moment.Moment | null = toMomentObject(moment(), "dd.mm.yyyy");

onFocusChange={arg => {}}
                    onNextMonthClick={e => {}}
                    onPrevMonthClick={e => {}}
                    numberOfMonths={2}
                    orientation="horizontal"
                    monthFormat="MM"
                    renderDay={day => day.toString()}
                    />
    }
}


const isInclusivelyAfterDayResult: boolean = isInclusivelyAfterDay(moment(),moment());
const isInclusivelyBeforeDayResult: boolean = isInclusivelyBeforeDay(moment(),moment());
const isNextDayDayResult: boolean = isNextDay(moment(),moment());
const isSameDayResult: boolean = isSameDay(moment(),moment());
const toISODateStringResult: string | null = toISODateString(moment(), "dd.mm.yyyy");
const toLocalizedDateStringResult: string | null = toLocalizedDateString(moment(), "dd.mm.yyyy");
const toMomentObjectResult: moment.Moment | null = toMomentObject(moment(), "dd.mm.yyyy");

return exceptions.find(exception => {
    const availabilityException = ensureAvailabilityException(exception.availabilityException);
    const start = availabilityException.attributes.start;
    const dayInUTC = day.clone().utc();
    return isSameDay(moment(start).utc(), dayInUTC);
  });
};

const dateModifiers = (availabilityPlan, exceptions, bookings, date) => {
  const exception = findException(exceptions, date);

  return {
    isOutsideRange: isOutsideRange(date),
    isSameDay: isSameDay(date, TODAY_MOMENT),
    isBlocked: isBlocked(availabilityPlan, exception, date),
    isBooked: isBooked(bookings, date),
    isInProgress: exception && exception.inProgress,
    isFailed: exception && exception.error,
  };
};