You can set when your Sunday School Grades will update in 360Members, and once you set this date, they will advance automatically, every year on this date. To access this, log in as an administrator, and click on the gear in the top right corner of the page, and select "General Settings." Once in general settings, check the box that says "Automatically promote Sunday School students on" and then, set the date you want the grades to advance on. If you want them to advance as soon as possible, then you want to set the date for tomorrow. When finished, click the blue save button at the bottom of the page. When the date you've selected comes around, all your Sunday School Students will advance by one grade. The update occurs at 12:30 AM UTC (7:30 Central Time the day before you select)
Note: If setting up your grades to advance for the first time, do not set the date to the current date, as this will not advance your grades.