limited dates only to dates with data available

app.py

@@ -40,7 +40,9 @@ if st.session_state.get("roads_loaded"):
     default_date = st.session_state.get("selected_date", datetime.now().date())
     default_time = st.session_state.get("selected_time", datetime.now().time())
 
-    st.date_input("Choose Date", value=default_date, key="selected_date")
+    st.date_input("Choose Date", value=default_date, key="selected_date", 
+                  min_value=datetime(2025, 3, 1).date(), 
+                  max_value=datetime(2025, 3, 31).date())
     st.time_input("Choose Time", value=default_time, key="selected_time")
 
     predict_time = datetime.combine(