DatetimeIndex.dayofyear The ordinal day of the year

DatetimeIndex.is_lexsorted_for_tuple(tup)

DatetimeIndex.shift(n, freq=None)

DatetimeIndex.join(other, how='left', level=None, return_indexers=False)

DatetimeIndex.date Returns numpy array of python datetime.date objects (namely, the date part of Timestamps without

DatetimeIndex.append(other)

DatetimeIndex.freq get/set the frequncy of the Index

DatetimeIndex.is_month_start Logical indicating if first day of month (defined by frequency)

DatetimeIndex.is_quarter_end Logical indicating if last day of quarter (defined by frequency)

DatetimeIndex.difference(other)