diff --git a/src/aeros_simulation/router.py b/src/aeros_simulation/router.py
index 10984bc..7c528ed 100644
--- a/src/aeros_simulation/router.py
+++ b/src/aeros_simulation/router.py
@@ -1,3 +1,4 @@
+from datetime import timedelta
 from collections import defaultdict
 from datetime import datetime
 import io
@@ -529,6 +530,9 @@ async def get_forecast_eaf(
     # Using the helper from utils.py
     offset_hours = hours_between(oh_date, now)
 
+    #start date is oh + offset
+    start_date = oh_date + timedelta(hours=offset_hours)
+
     # 4. Define Forecast Window
     duration = 168 if time_range == "weekly" else 720
 
@@ -578,7 +582,7 @@ async def get_forecast_eaf(
                 "sim_duration_hours": duration,
                 "reference_oh_date": oh_date_str
             },
-            message="Forecast generated successfully"
+            message=f"Forecast generated successfully, start date: {start_date.strftime('%Y-%m-%d %H:%M:%S')}, end_date: {(start_date + timedelta(hours=duration)).strftime('%Y-%m-%d %H:%M:%S')}"
         )
     except Exception as e:
         import logging