what you asking ? that you had been with facebook since from 2005 and haven't been update your facebook right now its 2021 . and what is the point you need to fix it . is you need to go to your store app and update it so that able to change the date and the year . if you have not using your facebook for many years or months then your facebook must been changed or got deleted by facebook or was hacked by unknown or your password need to be made again to able go on facebook . you can remake new one if you cant use your old account. but may be have to change your password to log in .since months ago facebook has been changed the designs for the messenger and people profiles background. you need to update it . if dont update then your facebook wont work correct