Merge pull request matplotlib#16906 from terencehonles/update-faq

update FAQ on how to register pandas converters

Author: QuLogic

doc/faq/howto_faq.rst

@@ -21,20 +21,12 @@ Plot `numpy.datetime64` values
 As of Matplotlib 2.2, `numpy.datetime64` objects are handled the same way
 as `datetime.datetime` objects.
 
-If you prefer the pandas converters and locators, you can register their
-converter with the `matplotlib.units` module::
-
-  from pandas.tseries import converter as pdtc
-  pdtc.register()
-
-If you only want to use the `pandas` converter for `numpy.datetime64` values ::
-
-  from pandas.tseries import converter as pdtc
-  import matplotlib.units as munits
-  import numpy as np
-
-  munits.registry[np.datetime64] = pdtc.DatetimeConverter()
+If you prefer the pandas converters and locators, you can register them.  This
+is done automatically when calling a pandas plot function and may be
+unnecessary when using pandas instead of Matplotlib directly. ::
 
+  from pandas.plotting import register_matplotlib_converters
+  register_matplotlib_converters()
 
 
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