diff --git a/analytics-service/src/main/resources/sample-data.json b/analytics-service/src/main/resources/sample-data.json
index e191691..ecb8f7c 100644
--- a/analytics-service/src/main/resources/sample-data.json
+++ b/analytics-service/src/main/resources/sample-data.json
@@ -150,7 +150,7 @@
     },
     {
       "eventId": "evt_2025020104",
-      "completedAt": null,
+      "completedAt": "2025-01-25T09:00:00",
       "channels": [
         {
           "channel": "우리동네TV",