matplotlib
diff --git a/‎doc/api/next_api_changes/deprecations/23080-OG.rst
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diff --git a/‎lib/matplotlib/dates.py
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diff --git a/‎lib/matplotlib/tests/test_dates.py
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+3-2Lines changed: 3 additions & 2 deletions b/‎lib/matplotlib/tests/test_dates.py
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+3-2Lines changed: 3 additions & 2 deletions
@@ -0,0 +1,8 @@
+``date_ticker_factory`` deprecated
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+The ``date_ticker_factory`` method in the `matplotlib.dates` module is
+deprecated. Instead use `~.AutoDateLocator` and `~.AutoDateFormatter` for a
+more flexible and scalable locator and formatter.
+
+The code can also be vendored if the fixed behaviour is expected.
@@ -1782,6 +1782,8 @@ def num2epoch(d):
     return np.asarray(d) * SEC_PER_DAY - dt
 
 
+@_api.deprecated("3.6", alternative="`AutoDateLocator` and `AutoDateFormatter`"
+                 " or vendor the code")
 def date_ticker_factory(span, tz=None, numticks=5):
     """
     Create a date locator with *numticks* (approx) and a date formatter
 
@@ -1319,8 +1319,9 @@ def test_concise_formatter_call():
                           (200, mdates.MonthLocator),
                           (2000, mdates.YearLocator)))
 def test_date_ticker_factory(span, expected_locator):
-    locator, _ = mdates.date_ticker_factory(span)
-    assert isinstance(locator, expected_locator)
+    with pytest.warns(_api.MatplotlibDeprecationWarning):
+        locator, _ = mdates.date_ticker_factory(span)
+        assert isinstance(locator, expected_locator)
 
 
 def test_usetex_newline():