diff --git a/tests/spdx/fixtures.py b/tests/spdx/fixtures.py
index 5d58b9fbf..3065bc824 100644
--- a/tests/spdx/fixtures.py
+++ b/tests/spdx/fixtures.py
@@ -140,9 +140,9 @@ def package_fixture(
     external_references=None,
     attribution_texts=None,
     primary_package_purpose=PackagePurpose.SOURCE,
-    release_date=datetime(2022, 12, 1),
-    built_date=datetime(2022, 12, 2),
-    valid_until_date=datetime(2022, 12, 3),
+    release_date=datetime(2022, 11, 1),
+    built_date=datetime(2022, 11, 2),
+    valid_until_date=datetime(2022, 11, 3),
 ) -> Package:
     checksums = [checksum_fixture()] if checksums is None else checksums
     license_info_from_files = (
@@ -235,7 +235,7 @@ def annotation_fixture(
     spdx_id="SPDXRef-File",
     annotation_type=AnnotationType.REVIEW,
     annotator=actor_fixture(name="annotatorName"),
-    annotation_date=datetime(2022, 12, 1),
+    annotation_date=datetime(2022, 12, 24),
     annotation_comment="annotationComment",
 ) -> Annotation:
     return Annotation(
diff --git a/tests/spdx/writer/json/expected_results/expected.json b/tests/spdx/writer/json/expected_results/expected.json
index b6a364b35..0d444ba52 100644
--- a/tests/spdx/writer/json/expected_results/expected.json
+++ b/tests/spdx/writer/json/expected_results/expected.json
@@ -29,7 +29,7 @@
             "SPDXID": "SPDXRef-File",
             "annotations": [
                 {
-                    "annotationDate": "2022-12-01T00:00:00Z",
+                    "annotationDate": "2022-12-24T00:00:00Z",
                     "annotationType": "REVIEW",
                     "annotator": "Person: annotatorName (some@mail.com)",
                     "comment": "annotationComment"
@@ -77,7 +77,7 @@
             "attributionTexts": [
                 "packageAttributionText"
             ],
-            "builtDate": "2022-12-02T00:00:00Z",
+            "builtDate": "2022-11-02T00:00:00Z",
             "checksums": [
                 {
                     "algorithm": "SHA1",
@@ -112,11 +112,11 @@
                 "packageVerificationCodeValue": "85ed0817af83a24ad8da68c2b5094de69833983c"
             },
             "primaryPackagePurpose": "SOURCE",
-            "releaseDate": "2022-12-01T00:00:00Z",
+            "releaseDate": "2022-11-01T00:00:00Z",
             "sourceInfo": "sourceInfo",
             "summary": "packageSummary",
             "supplier": "Person: supplierName (some@mail.com)",
-            "validUntilDate": "2022-12-03T00:00:00Z",
+            "validUntilDate": "2022-11-03T00:00:00Z",
             "versionInfo": "12.2"
         }
     ],
diff --git a/tests/spdx/writer/tagvalue/test_annotation_writer.py b/tests/spdx/writer/tagvalue/test_annotation_writer.py
index 1af76c342..5b36f5c32 100644
--- a/tests/spdx/writer/tagvalue/test_annotation_writer.py
+++ b/tests/spdx/writer/tagvalue/test_annotation_writer.py
@@ -20,7 +20,7 @@ def test_annotation_writer():
     handle.write.assert_has_calls(
         [
             call(f"Annotator: Person: {annotation.annotator.name} ({annotation.annotator.email})\n"),
-            call("AnnotationDate: 2022-12-01T00:00:00Z\n"),
+            call("AnnotationDate: 2022-12-24T00:00:00Z\n"),
             call(f"AnnotationType: {annotation.annotation_type.name}\n"),
             call(f"SPDXREF: {annotation.spdx_id}\n"),
             call(f"AnnotationComment: {annotation.annotation_comment}\n"),
diff --git a/tests/spdx/writer/tagvalue/test_package_writer.py b/tests/spdx/writer/tagvalue/test_package_writer.py
index 38873984a..958ff9931 100644
--- a/tests/spdx/writer/tagvalue/test_package_writer.py
+++ b/tests/spdx/writer/tagvalue/test_package_writer.py
@@ -49,8 +49,8 @@ def test_package_writer():
             call(f"ExternalRefComment: {package.external_references[0].comment}\n"),
             call(f"PackageAttributionText: {package.attribution_texts[0]}\n"),
             call(f"PrimaryPackagePurpose: {package.primary_package_purpose.name}\n"),
-            call("ReleaseDate: 2022-12-01T00:00:00Z\n"),
-            call("BuiltDate: 2022-12-02T00:00:00Z\n"),
-            call("ValidUntilDate: 2022-12-03T00:00:00Z\n"),
+            call("ReleaseDate: 2022-11-01T00:00:00Z\n"),
+            call("BuiltDate: 2022-11-02T00:00:00Z\n"),
+            call("ValidUntilDate: 2022-11-03T00:00:00Z\n"),
         ]
     )