Changing your Uber reservation time can be done directly within the app, provided you do so at least 60 minutes before your scheduled pickup. To make a change, open the Uber app, tap on the "Account" icon in the bottom right corner, and select "Trips." Find your upcoming reservation and tap on it to see the details. From there, you should see an option to "Edit" or "Manage Reservation." You can then adjust the date and time to your new preference. It is important to note that if you try to change the time too close to the pickup (usually within the hour), the app may not allow the modification, and you might have to cancel and rebook—which could result in a cancellation fee if a driver has already been dispatched. For "Uber Rent" or specialized airport reservations, the modification window might be longer (up to 24–48 hours). If you are using an Android device and the "Edit" button is missing, Uber's official support suggests cancelling the original ride and creating a new one with the updated time.