xarray.core.accessor_dt.DatetimeAccessor

class xarray.core.accessor_dt.DatetimeAccessor(obj)

Access datetime fields for DataArrays with datetime-like dtypes.

Similar to pandas, fields can be accessed through the .dt attribute for applicable DataArrays:

>>> ds = xarray.Dataset({'time': pd.date_range(start='2000/01/01',
...                                            freq='D', periods=100)})
>>> ds.time.dt
<xarray.core.accessors.DatetimeAccessor at 0x10c369f60>
>>> ds.time.dt.dayofyear[:5]
<xarray.DataArray 'dayofyear' (time: 5)>
array([1, 2, 3, 4, 5], dtype=int32)
Coordinates:
  * time     (time) datetime64[ns] 2000-01-01 2000-01-02 2000-01-03 ...

All of the pandas fields are accessible here. Note that these fields are not calendar-aware; if your datetimes are encoded with a non-Gregorian calendar (e.g. a 360-day calendar) using cftime, then some fields like dayofyear may not be accurate.

__init__(obj)

Initialize self. See help(type(self)) for accurate signature.

Methods

__init__(obj)	Initialize self.
ceil(freq)	Round timestamps upward to specified frequency resolution.
floor(freq)	Round timestamps downward to specified frequency resolution.
round(freq)	Round timestamps to specified frequency resolution.
strftime(date_format)	Return an array of formatted strings specified by date_format, which supports the same string format as the python standard library.

Attributes

day	The days of the datetime
dayofweek	The day of the week with Monday=0, Sunday=6
dayofyear	The ordinal day of the year
days_in_month	The number of days in the month
daysinmonth	The number of days in the month
hour	The hours of the datetime
microsecond	The microseconds of the datetime
minute	The minutes of the datetime
month	The month as January=1, December=12
nanosecond	The nanoseconds of the datetime
quarter	The quarter of the date
season	DJF)
second	The seconds of the datetime
time	Timestamps corresponding to datetimes
week	The week ordinal of the year
weekday	The day of the week with Monday=0, Sunday=6
weekday_name	Friday)
weekofyear	The week ordinal of the year
year	The year of the datetime