diff --git a/addons/resource/models/resource.py b/addons/resource/models/resource.py
index d8f37d3315e..1b752502846 100644
--- a/addons/resource/models/resource.py
+++ b/addons/resource/models/resource.py
@@ -1046,7 +1046,7 @@ class ResourceResource(models.Model):
             calendar_mapping[resource.calendar_id] |= resource
 
         for calendar, resources in calendar_mapping.items():
-            resources_unavailable_intervals = calendar._unavailable_intervals_batch(start_datetime, end_datetime, resources)
+            resources_unavailable_intervals = calendar._unavailable_intervals_batch(start_datetime, end_datetime, resources, tz=timezone(calendar.tz))
             resource_mapping.update(resources_unavailable_intervals)
         return resource_mapping
 
diff --git a/addons/test_resource/tests/test_resource.py b/addons/test_resource/tests/test_resource.py
index 2adb5393014..32a9a6fdc1d 100644
--- a/addons/test_resource/tests/test_resource.py
+++ b/addons/test_resource/tests/test_resource.py
@@ -2,6 +2,7 @@
 # Part of Odoo. See LICENSE file for full copyright and licensing details.
 
 from datetime import date, datetime
+from freezegun import freeze_time
 from pytz import timezone, utc
 
 from odoo import fields
@@ -1238,6 +1239,19 @@ class TestTimezones(TestResourceCommon):
             (date(2018, 4, 13), 8),
         ])
 
+    @freeze_time("2022-09-21 15:30:00", tz_offset=-10)
+    def test_unavailable_intervals(self):
+        resource = self.env['resource.resource'].create({
+            'name': 'resource',
+            'tz': self.tz3,
+        })
+        intervals = resource._get_unavailable_intervals(datetime(2022, 9, 21), datetime(2022, 9, 22))
+        self.assertEqual(list(intervals.values())[0], [
+            (datetime(2022, 9, 21, 0, 0, tzinfo=utc), datetime(2022, 9, 21, 6, 0, tzinfo=utc)),
+            (datetime(2022, 9, 21, 10, 0, tzinfo=utc), datetime(2022, 9, 21, 11, 0, tzinfo=utc)),
+            (datetime(2022, 9, 21, 15, 0, tzinfo=utc), datetime(2022, 9, 22, 0, 0, tzinfo=utc)),
+        ])
+
 class TestResource(TestResourceCommon):
 
     def test_calendars_validity_within_period(self):