chore: add ruff DTZ

noxfile.py

@@ -307,7 +307,7 @@ def _replace_file(original_path):
 
 def _changelog_update_unreleased_title(version, *, file):
     """Update an "*unreleased*" heading to "{version} - {date}" """
-    yyyy_mm_dd = datetime.datetime.today().strftime("%Y-%m-%d")
+    yyyy_mm_dd = datetime.datetime.now(tz=datetime.timezone.utc).strftime("%Y-%m-%d")
     title = f"{version} - {yyyy_mm_dd}"
 
     with _replace_file(file) as (original, replacement):

pyproject.toml

@@ -91,6 +91,7 @@ extend-exclude = [
 extend-select = [
     "ARG",   # flake8-unused-argument
     "B",     # flake8-bugbear
+    "DTZ",   # flake8-datetimez
     "E",
     "EXE",   # flake8-executable
     "F",

tests/test_pylock.py

@@ -1,7 +1,7 @@
 from __future__ import annotations
 
+import datetime
 import sys
-from datetime import datetime
 from pathlib import Path
 from typing import Any
 
@@ -368,7 +368,9 @@ def test_pylock_tool() -> None:
                 "sdist": {
                     "name": "example-1.0.tar.gz",
                     "path": "./example-1.0.tar.gz",
-                    "upload-time": datetime(2023, 10, 1, 0, 0),
+                    "upload-time": datetime.datetime(
+                        2023, 10, 1, 0, 0, tzinfo=datetime.timezone.utc
+                    ),
                     "hashes": {"sha256": "f" * 40},
                 },
                 "tool": {"pip": {"foo": "bar"}},