DatetimeIndex.ndim return the number of dimensions of the underlying data, by definition 1

DatetimeIndex.values return the underlying data as an ndarray

DatetimeIndex.nbytes return the number of bytes in the underlying data

DatetimeIndex.get_value(series, key)

DatetimeIndex.has_duplicates

DatetimeIndex.is_all_dates

DatetimeIndex.is_object()

DatetimeIndex.union_many(others)

DatetimeIndex.item()

DatetimeIndex.tolist()