diff --git a/doc/api/next_api_changes/removals/24128-OG.rst b/doc/api/next_api_changes/removals/24128-OG.rst
new file mode 100644
index 000000000000..2a17a6c54689
--- /dev/null
+++ b/doc/api/next_api_changes/removals/24128-OG.rst
@@ -0,0 +1,17 @@
+``epoch2num`` and ``num2epoch`` are removed
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+These methods convert from unix timestamps to matplotlib floats, but are not
+used internally to Matplotlib, and should not be needed by end users. To
+convert a unix timestamp to datetime, simply use
+`datetime.datetime.utcfromtimestamp`, or to use NumPy `~numpy.datetime64`
+``dt = np.datetime64(e*1e6, 'us')``.
+
+
+Locator and Formatter wrapper methods
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+The ``set_view_interval``, ``set_data_interval`` and ``set_bounds`` methods of
+`.Locator`\s and `.Formatter`\s (and their common base class, TickHelper) are
+removed. Directly manipulate the view and data intervals on the underlying
+axis instead.
diff --git a/doc/api/prev_api_changes/api_changes_3.3.0/deprecations.rst b/doc/api/prev_api_changes/api_changes_3.3.0/deprecations.rst
index 22aa93f89931..70babe0f7a56 100644
--- a/doc/api/prev_api_changes/api_changes_3.3.0/deprecations.rst
+++ b/doc/api/prev_api_changes/api_changes_3.3.0/deprecations.rst
@@ -545,8 +545,8 @@ experimental and may change in the future.
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 ... is deprecated.
 
-`.epoch2num` and `.num2epoch` are deprecated
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+``epoch2num`` and ``num2epoch`` are deprecated
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 These are unused and can be easily reproduced by other date tools.
 `.get_epoch` will return Matplotlib's epoch.
 
diff --git a/doc/api/prev_api_changes/api_changes_3.3.1.rst b/doc/api/prev_api_changes/api_changes_3.3.1.rst
index b3383a4e5fd2..3eda8a9a3a1a 100644
--- a/doc/api/prev_api_changes/api_changes_3.3.1.rst
+++ b/doc/api/prev_api_changes/api_changes_3.3.1.rst
@@ -15,7 +15,7 @@ reverts the deprecation.
 Functions ``epoch2num`` and ``dates.julian2num`` use ``date.epoch`` rcParam
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-Now `~.dates.epoch2num` and (undocumented) ``julian2num`` return floating point
+Now ``epoch2num`` and (undocumented) ``julian2num`` return floating point
 days since `~.dates.get_epoch` as set by :rc:`date.epoch`, instead of
 floating point days since the old epoch of "0000-12-31T00:00:00".  If
 needed, you can translate from the new to old values as
diff --git a/lib/matplotlib/dates.py b/lib/matplotlib/dates.py
index 672ea2c3b003..97803c4007b6 100644
--- a/lib/matplotlib/dates.py
+++ b/lib/matplotlib/dates.py
@@ -187,10 +187,9 @@
 from matplotlib import _api, cbook, ticker, units
 
 __all__ = ('datestr2num', 'date2num', 'num2date', 'num2timedelta', 'drange',
-           'epoch2num', 'num2epoch', 'set_epoch', 'get_epoch', 'DateFormatter',
-           'ConciseDateFormatter', 'AutoDateFormatter',
-           'DateLocator', 'RRuleLocator', 'AutoDateLocator', 'YearLocator',
-           'MonthLocator', 'WeekdayLocator',
+           'set_epoch', 'get_epoch', 'DateFormatter', 'ConciseDateFormatter',
+           'AutoDateFormatter', 'DateLocator', 'RRuleLocator',
+           'AutoDateLocator', 'YearLocator', 'MonthLocator', 'WeekdayLocator',
            'DayLocator', 'HourLocator', 'MinuteLocator',
            'SecondLocator', 'MicrosecondLocator',
            'rrule', 'MO', 'TU', 'WE', 'TH', 'FR', 'SA', 'SU',
@@ -1737,16 +1736,6 @@ def set_axis(self, axis):
         self._wrapped_locator.set_axis(axis)
         return super().set_axis(axis)
 
-    @_api.deprecated("3.5", alternative="`.Axis.set_view_interval`")
-    def set_view_interval(self, vmin, vmax):
-        self._wrapped_locator.set_view_interval(vmin, vmax)
-        return super().set_view_interval(vmin, vmax)
-
-    @_api.deprecated("3.5", alternative="`.Axis.set_data_interval`")
-    def set_data_interval(self, vmin, vmax):
-        self._wrapped_locator.set_data_interval(vmin, vmax)
-        return super().set_data_interval(vmin, vmax)
-
     def __call__(self):
         # if no data have been set, this will tank with a ValueError
         try:
@@ -1778,52 +1767,6 @@ def _get_interval(self):
         return self._interval
 
 
-@_api.deprecated(
-    "3.5",
-    alternative="``[date2num(datetime.utcfromtimestamp(t)) for t in e]`` or "
-                "numpy.datetime64 types")
-def epoch2num(e):
-    """
-    Convert UNIX time to days since Matplotlib epoch.
-
-    Parameters
-    ----------
-    e : list of floats
-        Time in seconds since 1970-01-01.
-
-    Returns
-    -------
-    `numpy.array`
-        Time in days since Matplotlib epoch (see `~.dates.get_epoch()`).
-    """
-
-    dt = (np.datetime64('1970-01-01T00:00:00', 's') -
-          np.datetime64(get_epoch(), 's')).astype(float)
-
-    return (dt + np.asarray(e)) / SEC_PER_DAY
-
-
-@_api.deprecated("3.5", alternative="`num2date(e).timestamp()<.num2date>`")
-def num2epoch(d):
-    """
-    Convert days since Matplotlib epoch to UNIX time.
-
-    Parameters
-    ----------
-    d : list of floats
-        Time in days since Matplotlib epoch (see `~.dates.get_epoch()`).
-
-    Returns
-    -------
-    `numpy.array`
-        Time in seconds since 1970-01-01.
-    """
-    dt = (np.datetime64('1970-01-01T00:00:00', 's') -
-          np.datetime64(get_epoch(), 's')).astype(float)
-
-    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):
diff --git a/lib/matplotlib/pylab.py b/lib/matplotlib/pylab.py
index a9e30cfcd185..289aa9050e0c 100644
--- a/lib/matplotlib/pylab.py
+++ b/lib/matplotlib/pylab.py
@@ -16,8 +16,7 @@
 import matplotlib as mpl
 
 from matplotlib.dates import (
-    date2num, num2date, datestr2num, drange, epoch2num,
-    num2epoch, DateFormatter, DateLocator,
+    date2num, num2date, datestr2num, drange, DateFormatter, DateLocator,
     RRuleLocator, YearLocator, MonthLocator, WeekdayLocator, DayLocator,
     HourLocator, MinuteLocator, SecondLocator, rrule, MO, TU, WE, TH, FR,
     SA, SU, YEARLY, MONTHLY, WEEKLY, DAILY, HOURLY, MINUTELY, SECONDLY,
diff --git a/lib/matplotlib/tests/test_dates.py b/lib/matplotlib/tests/test_dates.py
index fc5eed7f2856..5985b6135119 100644
--- a/lib/matplotlib/tests/test_dates.py
+++ b/lib/matplotlib/tests/test_dates.py
@@ -1240,19 +1240,6 @@ def test_change_interval_multiples():
     assert ax.get_xticklabels()[1].get_text() == 'Feb 01 2020'
 
 
-def test_epoch2num():
-    with _api.suppress_matplotlib_deprecation_warning():
-        mdates._reset_epoch_test_example()
-        mdates.set_epoch('0000-12-31')
-        assert mdates.epoch2num(86400) == 719164.0
-        assert mdates.num2epoch(719165.0) == 86400 * 2
-        # set back to the default
-        mdates._reset_epoch_test_example()
-        mdates.set_epoch('1970-01-01T00:00:00')
-        assert mdates.epoch2num(86400) == 1.0
-        assert mdates.num2epoch(2.0) == 86400 * 2
-
-
 def test_julian2num():
     mdates._reset_epoch_test_example()
     mdates.set_epoch('0000-12-31')
diff --git a/lib/matplotlib/ticker.py b/lib/matplotlib/ticker.py
index dfacdf4aead9..9e6865697194 100644
--- a/lib/matplotlib/ticker.py
+++ b/lib/matplotlib/ticker.py
@@ -196,21 +196,6 @@ def create_dummy_axis(self, **kwargs):
         if self.axis is None:
             self.axis = _DummyAxis(**kwargs)
 
-    @_api.deprecated("3.5", alternative="`.Axis.set_view_interval`")
-    def set_view_interval(self, vmin, vmax):
-        self.axis.set_view_interval(vmin, vmax)
-
-    @_api.deprecated("3.5", alternative="`.Axis.set_data_interval`")
-    def set_data_interval(self, vmin, vmax):
-        self.axis.set_data_interval(vmin, vmax)
-
-    @_api.deprecated(
-        "3.5",
-        alternative="`.Axis.set_view_interval` and `.Axis.set_data_interval`")
-    def set_bounds(self, vmin, vmax):
-        self.set_view_interval(vmin, vmax)
-        self.set_data_interval(vmin, vmax)
-
 
 class Formatter(TickHelper):
     """