diff --git a/src/botv2/cmd/concour/period.rs b/src/botv2/cmd/concour/period.rs
index a2facfb..2670352 100644
--- a/src/botv2/cmd/concour/period.rs
+++ b/src/botv2/cmd/concour/period.rs
@@ -66,7 +66,8 @@ pub async fn period(
     };
     let schedule = match Schedule::from_str(&cron_schedule) {
         Ok(schedule) => schedule,
-        Err(_) => {
+        Err(err) => {
+            warn!(err = err.to_string(), "Cron format is invalid");
             let embed = CreateEmbed::new()
                 .title("Invalid CRON format")
                 .color(colour::Color::RED)