diff --git a/src/components/EventItem.astro b/src/components/EventItem.astro
index 5c313d4..732cb65 100644
--- a/src/components/EventItem.astro
+++ b/src/components/EventItem.astro
@@ -73,7 +73,7 @@ function ccRenderer (item) {
 }
 
 function dateEnd(str, days) {
-    return format(addDays(new Date(str), days), 'yyyy-MM-dd');
+    return format(addDays(new Date(str), days-1), 'yyyy-MM-dd');
 }
 
 const statuses = {