diff --git a/platypush/entities/__init__.py b/platypush/entities/__init__.py
index 80aeff4d16..665ec86ae8 100644
--- a/platypush/entities/__init__.py
+++ b/platypush/entities/__init__.py
@@ -1,10 +1,8 @@
-from datetime import timedelta
 import logging
 from threading import Event
+from time import time
 from typing import Collection, Optional
 
-from platypush.utils import utcnow
-
 from ._base import (
     Entity,
     EntityKey,
@@ -47,8 +45,8 @@ def get_entities_engine(timeout: Optional[float] = None) -> EntitiesEngine:
 
     :param timeout: Timeout in seconds (default: None).
     """
-    time_start = utcnow()
-    while not timeout or (utcnow() - time_start < timedelta(seconds=timeout)):
+    time_start = time()
+    while not timeout or (time() - time_start < timeout):
         if _engine:
             break
 
diff --git a/platypush/plugins/bluetooth/_ble/_event_handler.py b/platypush/plugins/bluetooth/_ble/_event_handler.py
index 0712905373..08bd28a418 100644
--- a/platypush/plugins/bluetooth/_ble/_event_handler.py
+++ b/platypush/plugins/bluetooth/_ble/_event_handler.py
@@ -1,4 +1,4 @@
-from datetime import timedelta
+from datetime import timedelta, timezone
 from logging import getLogger
 from queue import Queue
 from typing import Callable, Collection, Dict, Final, List, Optional, Type
@@ -99,7 +99,8 @@ event_matchers: Dict[
         )
         and (
             not (old and old.updated_at)
-            or utcnow() - old.updated_at >= timedelta(seconds=_rssi_update_interval)
+            or utcnow() - old.updated_at.replace(tzinfo=timezone.utc)
+            >= timedelta(seconds=_rssi_update_interval)
         )
     ),
 }
diff --git a/platypush/plugins/calendar/ical/__init__.py b/platypush/plugins/calendar/ical/__init__.py
index 1d240f62b4..e71325a4e4 100644
--- a/platypush/plugins/calendar/ical/__init__.py
+++ b/platypush/plugins/calendar/ical/__init__.py
@@ -97,8 +97,7 @@ class CalendarIcalPlugin(Plugin, CalendarInterface):
             if (
                 event['status'] != 'cancelled'
                 and event['end'].get('dateTime')
-                and event['end']['dateTime']
-                >= utcnow().replace(tzinfo=datetime.timezone.utc).isoformat()
+                and event['end']['dateTime'] >= utcnow().isoformat()
                 and (
                     (
                         only_participating
diff --git a/platypush/plugins/google/calendar/__init__.py b/platypush/plugins/google/calendar/__init__.py
index 225e9c4c7f..1aef356da5 100644
--- a/platypush/plugins/google/calendar/__init__.py
+++ b/platypush/plugins/google/calendar/__init__.py
@@ -71,7 +71,7 @@ class GoogleCalendarPlugin(GooglePlugin, CalendarInterface):
         :meth:`platypush.plugins.calendar.CalendarPlugin.get_upcoming_events`.
         """
 
-        now = utcnow().isoformat() + 'Z'
+        now = utcnow().replace(tzinfo=None).isoformat() + 'Z'
         service = self.get_service('calendar', 'v3')
         result = (
             service.events()
diff --git a/platypush/plugins/sun/__init__.py b/platypush/plugins/sun/__init__.py
index 90cfdc723b..6933917df9 100644
--- a/platypush/plugins/sun/__init__.py
+++ b/platypush/plugins/sun/__init__.py
@@ -68,7 +68,7 @@ class SunPlugin(RunnablePlugin):
         dt = datetime.datetime.strptime(
             f'{now.year}-{now.month:02d}-{now.day:02d} {t}',
             '%Y-%m-%d %I:%M:%S %p',
-        ).replace(tzinfo=datetime.UTC)
+        ).replace(tzinfo=datetime.timezone.utc)
 
         if dt < now:
             dt += datetime.timedelta(days=1)
diff --git a/platypush/user/__init__.py b/platypush/user/__init__.py
index 64aa64cfee..a6db904bd3 100644
--- a/platypush/user/__init__.py
+++ b/platypush/user/__init__.py
@@ -115,9 +115,13 @@ class UserManager:
                 .first()
             )
 
-            if not user_session or (
-                user_session.expires_at and user_session.expires_at < utcnow()
-            ):
+            expires_at = (
+                user_session.expires_at.replace(tzinfo=datetime.timezone.utc)
+                if user_session and user_session.expires_at
+                else None
+            )
+
+            if not user_session or (expires_at and expires_at < utcnow()):
                 return None, None
 
             user = session.query(User).filter_by(user_id=user_session.user_id).first()
diff --git a/platypush/utils/__init__.py b/platypush/utils/__init__.py
index 9fd93d3e5c..f7c9c961ca 100644
--- a/platypush/utils/__init__.py
+++ b/platypush/utils/__init__.py
@@ -816,14 +816,10 @@ def wait_for_either(*events, timeout: Optional[float] = None, cls: Type = Event)
 
 def utcnow():
     """
-    A workaround util to maintain compatibility both with Python >= 3.12 (which
-    deprecated datetime.utcnow) and Python < 3.12 (which doesn't have
-    datetime.UTC).
+    utcnow() without tears. It always returns a datetime object in UTC
+    timezone.
     """
-    if hasattr(datetime, 'UTC'):
-        return datetime.datetime.now(datetime.UTC)
-
-    return datetime.datetime.utcnow()
+    return datetime.datetime.now(datetime.timezone.utc)
 
 
 # vim:sw=4:ts=4:et: