diff --git a/homeassistant/components/homeassistant/triggers/time_pattern.py b/homeassistant/components/homeassistant/triggers/time_pattern.py
index df49a79bcb6..14096d87277 100644
--- a/homeassistant/components/homeassistant/triggers/time_pattern.py
+++ b/homeassistant/components/homeassistant/triggers/time_pattern.py
@@ -37,6 +37,8 @@ class TimePattern:
 
             if isinstance(value, str) and value.startswith("/"):
                 number = int(value[1:])
+                if number == 0:
+                    raise vol.Invalid(f"must be a value between 1 and {self.maximum}")
             else:
                 value = number = int(value)
 
diff --git a/tests/components/homeassistant/triggers/test_time_pattern.py b/tests/components/homeassistant/triggers/test_time_pattern.py
index ffce8cd476b..2e7fa9dae08 100644
--- a/tests/components/homeassistant/triggers/test_time_pattern.py
+++ b/tests/components/homeassistant/triggers/test_time_pattern.py
@@ -365,6 +365,7 @@ async def test_invalid_schemas() -> None:
         {"platform": "time_pattern", "minutes": "/"},
         {"platform": "time_pattern", "minutes": "*/5"},
         {"platform": "time_pattern", "minutes": "/90"},
+        {"platform": "time_pattern", "hours": "/0", "minutes": 10},
         {"platform": "time_pattern", "hours": 12, "minutes": 0, "seconds": 100},
     )