holoviz
diff --git a/‎panel/io/cache.py‎
Lines changed: 2 additions & 0 deletions b/‎panel/io/cache.py‎
Lines changed: 2 additions & 0 deletions
diff --git a/‎panel/tests/io/test_cache.py‎
Lines changed: 9 additions & 0 deletions b/‎panel/tests/io/test_cache.py‎
Lines changed: 9 additions & 0 deletions
@@ -1,6 +1,7 @@
 """
 Implements memoization for functions with arbitrary arguments
 """
+import datetime as dt
 import functools
 import hashlib
 import inspect
@@ -134,6 +135,7 @@ def _io_hash(obj):
     functools.partial  : _partial_hash,
     unittest.mock.Mock : lambda obj: _int_to_bytes(id(obj)),
     (io.StringIO, io.BytesIO): _io_hash,
+    dt.date      : lambda obj: f'{type(obj).__name__}{obj}'.encode('utf-8'),
     # Fully qualified type strings
     'numpy.ndarray'              : _numpy_hash,
     'pandas.core.series.Series'  : _pandas_hash,
 
@@ -1,3 +1,4 @@
+import datetime as dt
 import io
 import pathlib
 import time
@@ -41,6 +42,14 @@ def test_bytes_hash():
     assert hashes_equal(b'0', b'0')
     assert not hashes_equal(b'0', b'1')
 
+def test_date_hash():
+    assert hashes_equal(dt.date(1988, 4, 14), dt.date(1988, 4, 14))
+    assert not hashes_equal(dt.date(1988, 4, 14), dt.date(1988, 4, 15))
+
+def test_datetime_hash():
+    assert hashes_equal(dt.datetime(1988, 4, 14, 12, 3, 2, 1), dt.datetime(1988, 4, 14, 12, 3, 2, 1))
+    assert not hashes_equal(dt.datetime(1988, 4, 14, 12, 3, 2, 1), dt.datetime(1988, 4, 14, 12, 3, 2, 2))
+
 def test_list_hash():
     assert hashes_equal([0], [0])
     assert hashes_equal(['a', ['b']], ['a', ['b']])