diff --git a/frontend/js/user/historical-graphs.js b/frontend/js/user/historical-graphs.js
index 7e4c08a4..a8be9cfe 100644
--- a/frontend/js/user/historical-graphs.js
+++ b/frontend/js/user/historical-graphs.js
@@ -8,7 +8,9 @@ let currentView = "weekly";
 document.addEventListener("DOMContentLoaded", () => {
   const currentPath = window.location.pathname;
   const pathSegments = currentPath.split("/");
-  const currentUsername = pathSegments[pathSegments.length - 1];
+  const currentUsername =
+    pathSegments[pathSegments.length - 1] ||
+    pathSegments[pathSegments.length - 2];
 
   const usernameHeading = document.getElementById("username-display");
   if (usernameHeading) {
diff --git a/scripts/sync-leaderboard.js b/scripts/sync-leaderboard.js
index 03328f63..cf9f4623 100644
--- a/scripts/sync-leaderboard.js
+++ b/scripts/sync-leaderboard.js
@@ -170,7 +170,10 @@ async function getYesterdaySnapshot(filePath) {
   const repo = "leetcode-ranking-data";
   const d = new Date();
   d.setDate(d.getDate() - 1);
-  const targetDate = d.toISOString().split("T")[0];
+  const year = d.getFullYear();
+  const month = String(d.getMonth() + 1).padStart(2, "0");
+  const date = String(d.getDate()).padStart(2, "0");
+  const targetDate = `${year}-${month}-${date}`;
   const until = `${targetDate}T23:59:59Z`;
   const commitsUrl = `https://api.github.com/repos/${owner}/${repo}/commits?path=${filePath}&until=${until}&per_page=1`;