diff --git a/pandas/_libs/tslibs/__init__.py b/pandas/_libs/tslibs/__init__.py
index 4a4e53eaa45fa..47b35aa6eabff 100644
--- a/pandas/_libs/tslibs/__init__.py
+++ b/pandas/_libs/tslibs/__init__.py
@@ -1,6 +1,5 @@
 __all__ = [
     "localize_pydatetime",
-    "normalize_date",
     "NaT",
     "NaTType",
     "iNaT",
@@ -17,7 +16,7 @@
 ]
 
 
-from .conversion import localize_pydatetime, normalize_date
+from .conversion import localize_pydatetime
 from .nattype import NaT, NaTType, iNaT, is_null_datetimelike
 from .np_datetime import OutOfBoundsDatetime
 from .period import IncompatibleFrequency, Period
diff --git a/pandas/core/arrays/datetimes.py b/pandas/core/arrays/datetimes.py
index f7408e69f7dec..8a1cacfe304ca 100644
--- a/pandas/core/arrays/datetimes.py
+++ b/pandas/core/arrays/datetimes.py
@@ -1,5 +1,5 @@
 from datetime import datetime, time, timedelta
-from typing import Union
+from typing import Optional, Union
 import warnings
 
 import numpy as np
@@ -13,7 +13,6 @@
     conversion,
     fields,
     iNaT,
-    normalize_date,
     resolution as libresolution,
     timezones,
     tzconversion,
@@ -2288,19 +2287,21 @@ def _infer_tz_from_endpoints(start, end, tz):
     return tz
 
 
-def _maybe_normalize_endpoints(start, end, normalize):
+def _maybe_normalize_endpoints(
+    start: Optional[Timestamp], end: Optional[Timestamp], normalize: bool
+):
     _normalized = True
 
     if start is not None:
         if normalize:
-            start = normalize_date(start)
+            start = start.normalize()
             _normalized = True
         else:
             _normalized = _normalized and start.time() == _midnight
 
     if end is not None:
         if normalize:
-            end = normalize_date(end)
+            end = end.normalize()
             _normalized = True
         else:
             _normalized = _normalized and end.time() == _midnight
diff --git a/pandas/tests/tslibs/test_api.py b/pandas/tests/tslibs/test_api.py
index 7a8a6d511aa69..a4c2e3f0787d0 100644
--- a/pandas/tests/tslibs/test_api.py
+++ b/pandas/tests/tslibs/test_api.py
@@ -38,7 +38,6 @@ def test_namespace():
         "delta_to_nanoseconds",
         "ints_to_pytimedelta",
         "localize_pydatetime",
-        "normalize_date",
         "tz_convert_single",
     ]
 
diff --git a/pandas/tests/tslibs/test_normalize_date.py b/pandas/tests/tslibs/test_normalize_date.py
deleted file mode 100644
index 2a41836f456ec..0000000000000
--- a/pandas/tests/tslibs/test_normalize_date.py
+++ /dev/null
@@ -1,41 +0,0 @@
-"""Tests for functions from pandas._libs.tslibs"""
-
-from datetime import date, datetime
-
-import pytest
-
-from pandas._libs import tslibs
-from pandas._libs.tslibs.timestamps import Timestamp
-
-
-@pytest.mark.parametrize(
-    "value,expected",
-    [
-        (date(2012, 9, 7), datetime(2012, 9, 7)),
-        (datetime(2012, 9, 7, 12), datetime(2012, 9, 7)),
-        (datetime(2007, 10, 1, 1, 12, 5, 10), datetime(2007, 10, 1)),
-    ],
-)
-def test_normalize_date(value, expected):
-    result = tslibs.normalize_date(value)
-    assert result == expected
-
-
-class SubDatetime(datetime):
-    pass
-
-
-@pytest.mark.parametrize(
-    "dt, expected",
-    [
-        (Timestamp(2000, 1, 1, 1), Timestamp(2000, 1, 1, 0)),
-        (datetime(2000, 1, 1, 1), datetime(2000, 1, 1, 0)),
-        (SubDatetime(2000, 1, 1, 1), SubDatetime(2000, 1, 1, 0)),
-    ],
-)
-def test_normalize_date_sub_types(dt, expected):
-    # GH 25851
-    # ensure that subclassed datetime works with
-    # normalize_date
-    result = tslibs.normalize_date(dt)
-    assert result == expected