diff --git a/NEWS b/NEWS
index b3bf2f709ae..115cb7a879a 100644
--- a/NEWS
+++ b/NEWS
@@ -29,6 +29,8 @@ PHP                                                                        NEWS
   . Fix GH-10447 ('p' format specifier does not yield 'Z' for 00:00). (Derick)
   . Fix GH-10152 (Custom properties of Date's child classes are not
     serialised). (Derick)
+  . Fixed bug GH-10747 (Private and protected properties in serialized Date*
+    objects throw). (Derick)
 
 - FFI:
   . Fixed incorrect bitshifting and masking in ffi bitfield. (nielsdos)
diff --git a/ext/date/php_date.c b/ext/date/php_date.c
index 9bfc4e19740..3ba577c7b2d 100644
--- a/ext/date/php_date.c
+++ b/ext/date/php_date.c
@@ -565,6 +565,36 @@ PHPAPI timelib_tzinfo *get_timezone_info(void)
 	}
 	return tzi;
 }
+
+static void update_property(zend_object *object, zend_string *key, zval *prop_val)
+{
+	if (ZSTR_VAL(key)[0] == '\0') { // not public
+		const char *class_name, *prop_name;
+		size_t prop_name_len;
+
+		if (zend_unmangle_property_name_ex(key, &class_name, &prop_name, &prop_name_len) == SUCCESS) {
+			if (class_name[0] != '*') { // private
+				zend_string *cname;
+				zend_class_entry *ce;
+
+				cname = zend_string_init(class_name, strlen(class_name), 0);
+				ce = zend_lookup_class(cname);
+
+				if (ce) {
+					zend_update_property(ce, object, prop_name, prop_name_len, prop_val);
+				}
+
+				zend_string_release_ex(cname, 0);
+			} else { // protected
+				zend_update_property(object->ce, object, prop_name, prop_name_len, prop_val);
+			}
+		}
+		return;
+	}
+
+	// public
+	zend_update_property(object->ce, object, ZSTR_VAL(key), ZSTR_LEN(key), prop_val);
+}
 /* }}} */
 
 
@@ -2794,7 +2824,7 @@ static void restore_custom_datetime_properties(zval *object, HashTable *myht)
 		if (!prop_name || (Z_TYPE_P(prop_val) == IS_REFERENCE) || date_time_is_internal_property(prop_name)) {
 			continue;
 		}
-		add_property_zval_ex(object, ZSTR_VAL(prop_name), ZSTR_LEN(prop_name), prop_val);
+		update_property(Z_OBJ_P(object), prop_name, prop_val);
 	} ZEND_HASH_FOREACH_END();
 }
 
@@ -3828,7 +3858,7 @@ static void restore_custom_datetimezone_properties(zval *object, HashTable *myht
 		if (!prop_name || (Z_TYPE_P(prop_val) == IS_REFERENCE) || date_timezone_is_internal_property(prop_name)) {
 			continue;
 		}
-		add_property_zval_ex(object, ZSTR_VAL(prop_name), ZSTR_LEN(prop_name), prop_val);
+		update_property(Z_OBJ_P(object), prop_name, prop_val);
 	} ZEND_HASH_FOREACH_END();
 }
 
@@ -4456,7 +4486,7 @@ static void restore_custom_dateinterval_properties(zval *object, HashTable *myht
 		if (!prop_name || (Z_TYPE_P(prop_val) == IS_REFERENCE) || date_interval_is_internal_property(prop_name)) {
 			continue;
 		}
-		add_property_zval_ex(object, ZSTR_VAL(prop_name), ZSTR_LEN(prop_name), prop_val);
+		update_property(Z_OBJ_P(object), prop_name, prop_val);
 	} ZEND_HASH_FOREACH_END();
 }
 
@@ -5418,7 +5448,7 @@ static void restore_custom_dateperiod_properties(zval *object, HashTable *myht)
 		if (!prop_name || (Z_TYPE_P(prop_val) == IS_REFERENCE) || date_period_is_internal_property(prop_name)) {
 			continue;
 		}
-		add_property_zval_ex(object, ZSTR_VAL(prop_name), ZSTR_LEN(prop_name), prop_val);
+		update_property(Z_OBJ_P(object), prop_name, prop_val);
 	} ZEND_HASH_FOREACH_END();
 }
 
diff --git a/ext/date/tests/gh10152.phpt b/ext/date/tests/gh10152.phpt
index 7886cf90ef2..8b5ec9529e2 100644
--- a/ext/date/tests/gh10152.phpt
+++ b/ext/date/tests/gh10152.phpt
@@ -1,5 +1,5 @@
 --TEST--
-GH-10152: Custom properties of DateTimeImmutable child classes are not serialized
+Bug GH-10152 (Custom properties of DateTimeImmutable child classes are not serialized)
 --FILE--
 <?php
 
@@ -16,7 +16,6 @@ class MyDateTimeImmutable extends DateTimeImmutable {
 $datetime = new MyDateTimeImmutable('2022-12-22T11:26:00Z', myProperty: true);
 $serialized = serialize($datetime);
 $unserialized = unserialize($serialized);
-
 var_dump($unserialized->myProperty);
 ?>
 --EXPECT--
diff --git a/ext/date/tests/gh10747-1.phpt b/ext/date/tests/gh10747-1.phpt
new file mode 100644
index 00000000000..04f3efc1296
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diff --git a/ext/date/tests/gh10747-2.phpt b/ext/date/tests/gh10747-2.phpt
new file mode 100644
index 00000000000..7bda7858d88
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diff --git a/ext/date/tests/gh10747-3.phpt b/ext/date/tests/gh10747-3.phpt
new file mode 100644
index 00000000000..2ea11619e7b
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diff --git a/ext/date/tests/gh10747-4.phpt b/ext/date/tests/gh10747-4.phpt
new file mode 100644
index 00000000000..500c0e320c7
Binary files /dev/null and b/ext/date/tests/gh10747-4.phpt differ
diff --git a/ext/date/tests/gh10747-error.phpt b/ext/date/tests/gh10747-error.phpt
new file mode 100644
index 00000000000..bfa37512172
Binary files /dev/null and b/ext/date/tests/gh10747-error.phpt differ