You can renew your library card by going to your library with your library card and see the librarian who will adjust the expiry date of your membership. You can also renew your library card online using your library card number and PIN, if your library supports this system.
You can renew your library card before it expires and your new pass is valid from the day you renew it. You can also renew your card after it has expired. If you lost your library card, you are still allowed to renew it, although you are required to do so in person to the Reader Registration or the librarian who is in charge.