Use UTC instead of timezone.utc

Author: larrybradley

docs/conf.py

@@ -15,17 +15,13 @@
 
 import os
 import sys
-from datetime import datetime, timezone
+import tomllib
+from datetime import UTC, datetime
 from importlib import metadata
 from pathlib import Path
 
 from sphinx.util import logging
 
-if sys.version_info < (3, 11):
-    import tomli as tomllib
-else:
-    import tomllib
-
 logger = logging.getLogger(__name__)
 
 try:
@@ -89,7 +85,7 @@
 # -- Project information ------------------------------------------------------
 project = project_meta['name']
 author = project_meta['authors'][0]['name']
-project_copyright = f'2011-{datetime.now(tz=timezone.utc).year}, {author}'
+project_copyright = f'2011-{datetime.now(tz=UTC).year}, {author}'
 github_project = 'astropy/photutils'
 
 # The version info for the project you're documenting, acts as

photutils/utils/_misc.py

@@ -5,7 +5,7 @@
 """
 
 import sys
-from datetime import datetime, timezone
+from datetime import UTC, datetime
 
 
 def _get_version_info():
@@ -49,11 +49,7 @@ def _get_date(utc=False):
     result : str
         The current date/time.
     """
-    if not utc:
-        now = datetime.now().astimezone()
-    else:
-        now = datetime.now(timezone.utc)
-
+    now = datetime.now().astimezone() if not utc else datetime.now(UTC)
     return now.strftime('%Y-%m-%d %H:%M:%S %Z')