diff --git a/backend_api_python/app/routes/dashboard.py b/backend_api_python/app/routes/dashboard.py
index 3150df7..003f2ca 100644
--- a/backend_api_python/app/routes/dashboard.py
+++ b/backend_api_python/app/routes/dashboard.py
@@ -354,8 +354,16 @@ def summary():
                 """,
                 (user_id,)
             )
-            recent_trades = cur.fetchall() or []
+            recent_trades_raw = cur.fetchall() or []
             cur.close()
+        
+        # Convert datetime to timestamp for frontend compatibility
+        recent_trades = []
+        for t in recent_trades_raw:
+            trade = dict(t)
+            if trade.get('created_at') and hasattr(trade['created_at'], 'timestamp'):
+                trade['created_at'] = int(trade['created_at'].timestamp())
+            recent_trades.append(trade)
 
         # Compute performance statistics
         perf_stats = _compute_performance_stats(recent_trades)
diff --git a/quantdinger_vue/src/views/dashboard/index.vue b/quantdinger_vue/src/views/dashboard/index.vue
index b81f02e..d30fbfb 100644
--- a/quantdinger_vue/src/views/dashboard/index.vue
+++ b/quantdinger_vue/src/views/dashboard/index.vue
@@ -992,12 +992,20 @@ export default {
     formatTime (timestamp) {
       if (!timestamp) return '-'
       try {
-        const raw = typeof timestamp === 'string' ? parseInt(timestamp, 10) : Number(timestamp)
-        if (!raw || Number.isNaN(raw)) return '-'
-        const ms = raw < 1e12 ? raw * 1000 : raw
-        const d = new Date(ms)
-        if (isNaN(d.getTime())) return '-'
-        return d.toLocaleString()
+        let date
+        // Handle ISO 8601 date strings (e.g., "2024-01-17T01:58:10.000Z")
+        if (typeof timestamp === 'string' && timestamp.includes('-') && timestamp.includes(':')) {
+          date = new Date(timestamp)
+        } else if (typeof timestamp === 'number' || (typeof timestamp === 'string' && /^\d+$/.test(timestamp))) {
+          // Handle numeric timestamps (seconds or milliseconds)
+          const numTimestamp = typeof timestamp === 'string' ? parseInt(timestamp, 10) : timestamp
+          const ms = numTimestamp < 1e12 ? numTimestamp * 1000 : numTimestamp
+          date = new Date(ms)
+        } else {
+          return '-'
+        }
+        if (isNaN(date.getTime())) return '-'
+        return date.toLocaleString()
       } catch (e) {
         return '-'
       }