You can renew your Disneyland Magic Key pass starting 30 days before its expiration date. Disneyland typically sends an email notification when your renewal window opens, and the "Renew" option will automatically appear in the "Tickets and Passes" section of the Disneyland mobile app or on the official website once you are within that 30-day timeframe. It is crucial to complete the renewal process before the pass officially expires; if the expiration date passes, you cannot "renew" and must instead wait for a general sale of new Magic Keys, which are often limited and can sell out quickly. One benefit of renewing early within your window is that your new pass will automatically activate the day after your current one expires, ensuring there is no gap in your ability to make theme park reservations. Furthermore, renewing within the window allows you to hold reservations for both your current pass and your future pass simultaneously, maximizing your planning flexibility for the upcoming year.