It’s the first Monday of the new month and you know what that means. No, it has nothing to do with the Supreme Court as the latter kicks off each new term on the first Monday in October. The first Monday each month is when Google releases the latest Android security update for compatible Pixel models.
Current models receiving support from Google (along with the appropriate version number) include the Pixel 3/3 XL (RQ2A.210505.002), Pixel 3a/3a XL (RQ2A.210505.002), Pixel 4/4 XL (RQ2A.210505.002), Pixel 4a (RQ2A.210505.002), Pixel 4a 5G (RQ2A.210505.003), and the Pixel 5 (RQ2A.210505.003). To update your Pixel OTA, go to Settings > System > Advanced > System update.