diff --git a/config.json b/config.json
index 5a10535..df131ee 100644
--- a/config.json
+++ b/config.json
@@ -5,10 +5,10 @@
     "company_name": "Footprints AI",
     "email": "denisa@example.com",
     "phone": "+40 712 345 678",
-    "store_name": "Carrefour Romania",
+    "store_name": "Ursus",
     "country": "Romania",
-    "starting_date": "01.01.2026",
-    "duration": 36,
+    "starting_date": "01.01.2027",
+    "duration": 24,
     "store_types": ["convenience", "supermarket", "hypermarket"],
     "open_days_per_month": 26,
 
diff --git a/update_excel.py b/update_excel.py
index 427486f..04ccb2c 100755
--- a/update_excel.py
+++ b/update_excel.py
@@ -9,6 +9,7 @@ from zipfile import ZipFile, ZIP_DEFLATED
 def update_excel_variables(excel_path):
     """
     Update the Variables sheet in the Excel file with values from config.json
+    and hide forecast sheets that aren't in the calculated years array
     
     Args:
         excel_path (str): Path to the Excel file to update
@@ -112,6 +113,68 @@ def update_excel_variables(excel_path):
         print("Saving workbook with updated variables...")
         wb.save(excel_path)
         
+        # Get the calculated years array from config
+        starting_date = user_data.get('starting_date', '')
+        duration = user_data.get('duration', 36)
+        calculated_years = []
+        
+        # Import datetime at the module level to avoid scope issues
+        import datetime
+        from dateutil.relativedelta import relativedelta
+        
+        # Calculate years array based on starting_date and duration
+        try:
+            # Try to parse the date, supporting both dd/mm/yyyy and dd.mm.yyyy formats
+            if starting_date:
+                if '/' in str(starting_date):
+                    day, month, year = map(int, str(starting_date).split('/'))
+                elif '.' in str(starting_date):
+                    day, month, year = map(int, str(starting_date).split('.'))
+                elif '-' in str(starting_date):
+                    # Handle ISO format (yyyy-mm-dd)
+                    date_parts = str(starting_date).split('-')
+                    if len(date_parts) == 3:
+                        year, month, day = map(int, date_parts)
+                    else:
+                        # Default to current date if format is not recognized
+                        current_date = datetime.datetime.now()
+                        year, month, day = current_date.year, current_date.month, current_date.day
+                elif isinstance(starting_date, datetime.datetime):
+                    day, month, year = starting_date.day, starting_date.month, starting_date.year
+                else:
+                    # Default to current date if format is not recognized
+                    current_date = datetime.datetime.now()
+                    year, month, day = current_date.year, current_date.month, current_date.day
+                
+                # Create datetime object for starting date
+                start_date = datetime.datetime(year, month, day)
+                
+                # Calculate end date (starting date + duration months - 1 day)
+                end_date = start_date + relativedelta(months=duration-1)
+                
+                # Create a set of years (to avoid duplicates)
+                years_set = set()
+                
+                # Add starting year
+                years_set.add(start_date.year)
+                
+                # Add ending year
+                years_set.add(end_date.year)
+                
+                # If there are years in between, add those too
+                for y in range(start_date.year + 1, end_date.year):
+                    years_set.add(y)
+                
+                # Convert set to sorted list
+                calculated_years = sorted(list(years_set))
+                print(f"Calculated years for sheet visibility: {calculated_years}")
+            else:
+                # Default to current year if no starting date
+                calculated_years = [datetime.datetime.now().year]
+        except Exception as e:
+            print(f"Error calculating years for sheet visibility: {e}")
+            calculated_years = [datetime.datetime.now().year]
+        
         # Update sheet names - replace {store_name} with actual store name
         store_name = user_data.get('store_name', '')
         if store_name:
@@ -130,8 +193,21 @@ def update_excel_variables(excel_path):
                     # Store the mapping
                     sheet_name_mapping[sheet_name] = new_sheet_name
                     print(f"Renamed sheet '{sheet_name}' to '{new_sheet_name}'")
+                    
+                    # Check if this is a forecast sheet and if its year is in the calculated years
+                    # Forecast sheets have names like "2025 – Forecast {store_name}"
+                    if "Forecast" in new_sheet_name:
+                        # Extract the year from the sheet name
+                        try:
+                            sheet_year = int(new_sheet_name.split()[0])
+                            # Hide the sheet if its year is not in the calculated years
+                            if sheet_year not in calculated_years:
+                                sheet.sheet_state = 'hidden'
+                                print(f"Hiding sheet '{new_sheet_name}' as year {sheet_year} is not in calculated years {calculated_years}")
+                        except Exception as e:
+                            print(f"Error extracting year from sheet name '{new_sheet_name}': {e}")
             
-            # Save the workbook with renamed sheets
+            # Save the workbook with renamed and hidden sheets
             wb.save(excel_path)
             
             # Use direct XML modification to replace all instances of {store_name} in formulas