diff --git a/homeassistant/components/tibber/services.py b/homeassistant/components/tibber/services.py
index 82353bb78d7..35facbcd545 100644
--- a/homeassistant/components/tibber/services.py
+++ b/homeassistant/components/tibber/services.py
@@ -3,7 +3,7 @@
 from __future__ import annotations
 
 import datetime as dt
-from datetime import date, datetime
+from datetime import datetime
 from functools import partial
 from typing import Any, Final
 
@@ -61,27 +61,24 @@ async def __get_prices(call: ServiceCall, *, hass: HomeAssistant) -> ServiceResp
         ]
 
         selected_data = [
-            price
-            for price in price_data
-            if price["start_time"].replace(tzinfo=None) >= start
-            and price["start_time"].replace(tzinfo=None) < end
+            price for price in price_data if start <= price["start_time"] < end
         ]
         tibber_prices[home_nickname] = selected_data
 
     return {"prices": tibber_prices}
 
 
-def __get_date(date_input: str | None, mode: str | None) -> date | datetime:
+def __get_date(date_input: str | None, mode: str | None) -> datetime:
     """Get date."""
     if not date_input:
         if mode == "end":
             increment = dt.timedelta(days=1)
         else:
             increment = dt.timedelta()
-        return datetime.fromisoformat(dt_util.now().date().isoformat()) + increment
+        return dt_util.start_of_local_day() + increment
 
     if value := dt_util.parse_datetime(date_input):
-        return value
+        return dt_util.as_local(value)
 
     raise ServiceValidationError(
         "Invalid datetime provided.",
diff --git a/tests/components/tibber/test_services.py b/tests/components/tibber/test_services.py
index e9bee3ba31f..1df91d719fe 100644
--- a/tests/components/tibber/test_services.py
+++ b/tests/components/tibber/test_services.py
@@ -11,8 +11,11 @@ from homeassistant.components.tibber.const import DOMAIN
 from homeassistant.components.tibber.services import PRICE_SERVICE_NAME, __get_prices
 from homeassistant.core import ServiceCall
 from homeassistant.exceptions import ServiceValidationError
+from homeassistant.util import dt as dt_util
 
-STARTTIME = dt.datetime.fromtimestamp(1615766400)
+STARTTIME = dt.datetime.fromtimestamp(1615766400).replace(
+    tzinfo=dt_util.get_default_time_zone()
+)
 
 
 def generate_mock_home_data():
@@ -246,6 +249,75 @@ async def test_get_prices_start_tomorrow(
     }
 
 
+@pytest.mark.parametrize(
+    "start_time",
+    [
+        STARTTIME.isoformat(),
+        STARTTIME.replace(tzinfo=None).isoformat(),
+        (STARTTIME + dt.timedelta(hours=4))
+        .replace(tzinfo=dt.timezone(dt.timedelta(hours=4)))
+        .isoformat(),
+    ],
+)
+async def test_get_prices_with_timezones(
+    freezer: FrozenDateTimeFactory,
+    start_time: str,
+) -> None:
+    """Test __get_prices with timezone and without."""
+    freezer.move_to(STARTTIME)
+    call = ServiceCall(DOMAIN, PRICE_SERVICE_NAME, {"start": start_time})
+
+    result = await __get_prices(call, hass=create_mock_hass())
+
+    assert result == {
+        "prices": {
+            "first_home": [
+                {
+                    "start_time": STARTTIME,
+                    "price": 0.46914,
+                    "level": "VERY_EXPENSIVE",
+                },
+                {
+                    "start_time": STARTTIME + dt.timedelta(hours=1),
+                    "price": 0.46914,
+                    "level": "VERY_EXPENSIVE",
+                },
+            ],
+            "second_home": [
+                {
+                    "start_time": STARTTIME,
+                    "price": 0.46914,
+                    "level": "VERY_EXPENSIVE",
+                },
+                {
+                    "start_time": STARTTIME + dt.timedelta(hours=1),
+                    "price": 0.46914,
+                    "level": "VERY_EXPENSIVE",
+                },
+            ],
+        }
+    }
+
+
+@pytest.mark.parametrize(
+    "start_time",
+    [
+        (STARTTIME + dt.timedelta(hours=4)).isoformat(),
+        (STARTTIME + dt.timedelta(hours=4)).replace(tzinfo=None).isoformat(),
+    ],
+)
+async def test_get_prices_with_wrong_timezones(
+    freezer: FrozenDateTimeFactory,
+    start_time: str,
+) -> None:
+    """Test __get_prices with timezone and without, while expecting it to fail."""
+    freezer.move_to(STARTTIME)
+    call = ServiceCall(DOMAIN, PRICE_SERVICE_NAME, {"start": start_time})
+
+    result = await __get_prices(call, hass=create_mock_hass())
+    assert result == {"prices": {"first_home": [], "second_home": []}}
+
+
 async def test_get_prices_invalid_input() -> None:
     """Test __get_prices with invalid input."""