1. Press the [Menu] key.
  2. Press the [▲] or [▼]key to display [System Settings], then press the [OK] key
     
  3. Press the [▲] or [▼]key to display [Timer Settings], then press the [OK] key
     
  4. Press the [▲] or [▼] key to display [Sleep Mode Timer], then press the [OK] key
     
  5. Press the [▲] or [▼] key to set the date, then press the [OK] key