diff --git a/taskiq/cli/scheduler/run.py b/taskiq/cli/scheduler/run.py
index 03c9faf6..c7ee03f1 100644
--- a/taskiq/cli/scheduler/run.py
+++ b/taskiq/cli/scheduler/run.py
@@ -99,7 +99,10 @@ def is_cron_task_now(
     # If timezone was specified as string we convert it timezone
     # offset and then apply.
     elif offset and isinstance(offset, str):
-        now = now.astimezone(ZoneInfo(offset))
+        try:
+            now = now.astimezone(ZoneInfo(offset))
+        except Exception as e:
+            raise CronValueError(e) from e
 
     try:
         return pycron.is_now(cron_value, now)
diff --git a/tests/cli/scheduler/test_is_cron_task_now.py b/tests/cli/scheduler/test_is_cron_task_now.py
index bbbe079b..630da454 100644
--- a/tests/cli/scheduler/test_is_cron_task_now.py
+++ b/tests/cli/scheduler/test_is_cron_task_now.py
@@ -75,3 +75,21 @@ def test_is_cron_task_now(
 def test_is_cron_task_now_invalid_cron() -> None:
     with pytest.raises(CronValueError):
         is_cron_task_now("invalid cron", datetime.now())
+
+
+def test_is_cron_task_now_invalid_offset_string() -> None:
+    with pytest.raises(CronValueError):
+        is_cron_task_now(
+            cron_value="* * * * *",
+            now=datetime.now(timezone.utc),
+            offset="UTC+3",
+        )
+
+
+def test_is_cron_task_now_unknown_timezone_name() -> None:
+    with pytest.raises(CronValueError):
+        is_cron_task_now(
+            cron_value="* * * * *",
+            now=datetime.now(timezone.utc),
+            offset="Europa/Madrid",
+        )