diff --git a/homeassistant/components/vulcan/calendar.py b/homeassistant/components/vulcan/calendar.py
index debf1f4ea0d..791ae9ee7c4 100644
--- a/homeassistant/components/vulcan/calendar.py
+++ b/homeassistant/components/vulcan/calendar.py
@@ -3,6 +3,7 @@ from __future__ import annotations
 
 from datetime import date, datetime, timedelta
 import logging
+from zoneinfo import ZoneInfo
 
 from aiohttp import ClientConnectorError
 from vulcan import UnauthorizedCertificateException
@@ -107,8 +108,12 @@ class VulcanCalendarEntity(CalendarEntity):
         event_list = []
         for item in events:
             event = CalendarEvent(
-                start=datetime.combine(item["date"], item["time"].from_),
-                end=datetime.combine(item["date"], item["time"].to),
+                start=datetime.combine(item["date"], item["time"].from_).astimezone(
+                    ZoneInfo("Europe/Warsaw")
+                ),
+                end=datetime.combine(item["date"], item["time"].to).astimezone(
+                    ZoneInfo("Europe/Warsaw")
+                ),
                 summary=item["lesson"],
                 location=item["room"],
                 description=item["teacher"],
@@ -156,8 +161,12 @@ class VulcanCalendarEntity(CalendarEntity):
             ),
         )
         self._event = CalendarEvent(
-            start=datetime.combine(new_event["date"], new_event["time"].from_),
-            end=datetime.combine(new_event["date"], new_event["time"].to),
+            start=datetime.combine(
+                new_event["date"], new_event["time"].from_
+            ).astimezone(ZoneInfo("Europe/Warsaw")),
+            end=datetime.combine(new_event["date"], new_event["time"].to).astimezone(
+                ZoneInfo("Europe/Warsaw")
+            ),
             summary=new_event["lesson"],
             location=new_event["room"],
             description=new_event["teacher"],