diff --git a/providers/cncf/kubernetes/src/airflow/providers/cncf/kubernetes/operators/pod.py b/providers/cncf/kubernetes/src/airflow/providers/cncf/kubernetes/operators/pod.py
index eb290a881f32a..b8dc02d69269c 100644
--- a/providers/cncf/kubernetes/src/airflow/providers/cncf/kubernetes/operators/pod.py
+++ b/providers/cncf/kubernetes/src/airflow/providers/cncf/kubernetes/operators/pod.py
@@ -1051,11 +1051,17 @@ def _clean(self, event: dict[str, Any], result: dict | None, context: Context) -
         reraise=True,
     )
     def _write_logs(self, pod: k8s.V1Pod, follow: bool = False, since_time: DateTime | None = None) -> None:
-        since_seconds = (
-            math.ceil((datetime.datetime.now(tz=datetime.timezone.utc) - since_time).total_seconds())
-            if since_time
-            else None
-        )
+        since_seconds = None
+        if since_time:
+            try:
+                since_seconds = math.ceil(
+                    (datetime.datetime.now(tz=datetime.timezone.utc) - since_time).total_seconds()
+                )
+            except TypeError:
+                self.log.warning(
+                    "Error calculating since_seconds with since_time %s. Using None instead.",
+                    since_time,
+                )
         logs = self.client.read_namespaced_pod_log(
             name=pod.metadata.name,
             namespace=pod.metadata.namespace,
diff --git a/providers/cncf/kubernetes/tests/unit/cncf/kubernetes/operators/test_pod.py b/providers/cncf/kubernetes/tests/unit/cncf/kubernetes/operators/test_pod.py
index 5a28eb2ff6d3f..66d1e05914d5a 100644
--- a/providers/cncf/kubernetes/tests/unit/cncf/kubernetes/operators/test_pod.py
+++ b/providers/cncf/kubernetes/tests/unit/cncf/kubernetes/operators/test_pod.py
@@ -26,6 +26,7 @@
 import pendulum
 import pytest
 import tenacity
+import time_machine
 from kubernetes.client import ApiClient, V1Pod, V1PodSecurityContext, V1PodStatus, models as k8s
 from kubernetes.client.exceptions import ApiException
 
@@ -2917,6 +2918,35 @@ def test_write_logs_gives_up_after_max_retries(
         post_complete_action.assert_called_once()
         assert "Reading of logs interrupted with error" in caplog.text
 
+    @time_machine.travel("2026-01-01 00:00:00", tick=False)
+    @patch(KUB_OP_PATH.format("client"))
+    def test_write_logs_with_valid_since_time(self, mocked_client):
+        """Test that since_seconds is calculated correctly when since_time is a valid datetime."""
+        pod = k8s.V1Pod(metadata=k8s.V1ObjectMeta(name=TEST_NAME, namespace=TEST_NAMESPACE))
+        since_time = datetime.datetime(
+            2026, 1, 1, 0, 0, 0, tzinfo=datetime.timezone.utc
+        ) - datetime.timedelta(seconds=30)
+        k = KubernetesPodOperator(task_id="task", get_logs=True)
+        k._write_logs(pod, since_time=since_time)
+        _, call_kwargs = mocked_client.read_namespaced_pod_log.call_args
+        assert call_kwargs["since_seconds"] == 30
+
+    @patch(KUB_OP_PATH.format("client"))
+    def test_write_logs_with_invalid_since_time_falls_back_to_none(self, mocked_client):
+        """Test that a TypeError from an invalid since_time is caught, warns, and uses since_seconds=None."""
+        pod = k8s.V1Pod(metadata=k8s.V1ObjectMeta(name=TEST_NAME, namespace=TEST_NAMESPACE))
+        k = KubernetesPodOperator(task_id="task", get_logs=True)
+
+        with patch.object(k.log, "warning") as mock_warning:
+            k._write_logs(pod, since_time="not-a-datetime")
+
+        _, call_kwargs = mocked_client.read_namespaced_pod_log.call_args
+        assert call_kwargs["since_seconds"] is None
+        mock_warning.assert_called_once_with(
+            "Error calculating since_seconds with since_time %s. Using None instead.",
+            "not-a-datetime",
+        )
+
     @pytest.mark.parametrize(
         ("log_pod_spec_on_failure", "expect_match"),
         [