diff --git a/radicale/config.py b/radicale/config.py
index 4442b323..005fcf26 100644
--- a/radicale/config.py
+++ b/radicale/config.py
@@ -602,6 +602,10 @@ DEFAULT_CONFIG_SCHEMA: types.CONFIG_SCHEMA = OrderedDict([
             "value": "BDAY={year}-{month}-{day}",
             "help": "conversion bday description template",
             "type": str}),
+        ("conversion_bday_alarm_trigger_template", {
+            "value": "-15H;BDAY tomorrow|9H;BDAY today",
+            "help": "conversion bday alarm trigger template",
+            "type": str}),
         ])),
     ("hook", OrderedDict([
         ("type", {