Cita: DonChoriYou can add it. Just on the bottom of the coin page you click on "Modify or add information about this coin". A referee will confirm your changes.
Thanks, I want to do that, but in the edit page, I saw this message: The list of years is complete and has been verified. Most requests to add new year entries are sent for the wrong coin type. If you are sure you own this coin with a date that is not listed here, you can ask to have it added through the forum and include a picture of your coin in your message.