matplotlib
diff --git a/‎doc/api/api_changes.rst
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diff --git a/‎lib/matplotlib/axes/_axes.py
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diff --git a/‎lib/matplotlib/pyplot.py
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@@ -107,6 +107,9 @@ original location:
   does the exact same thing as `FormatStrFormatter`, but for new-style
   formatting strings.
 
+* The ``fmt`` argument of :meth:`~matplotlib.axes.Axes.plot_date` has been
+  changed from ``bo`` to just ``o``, so color cycling can happen by default.
+
 .. _changes_in_1_3:
 
 
 
@@ -1337,7 +1337,7 @@ def plot(self, *args, **kwargs):
         return lines
 
     @docstring.dedent_interpd
-    def plot_date(self, x, y, fmt='bo', tz=None, xdate=True, ydate=False,
+    def plot_date(self, x, y, fmt='o', tz=None, xdate=True, ydate=False,
                   **kwargs):
         """
         Plot with data with dates.
 
@@ -3066,7 +3066,7 @@ def plot(*args, **kwargs):
 # This function was autogenerated by boilerplate.py.  Do not edit as
 # changes will be lost
 @_autogen_docstring(Axes.plot_date)
-def plot_date(x, y, fmt='bo', tz=None, xdate=True, ydate=False, hold=None,
+def plot_date(x, y, fmt='o', tz=None, xdate=True, ydate=False, hold=None,
               **kwargs):
     ax = gca()
     # allow callers to override the hold state by passing hold=True|False