iOS12.2 beta allows users to set the downtime.

Apple released iOS 12.2 beta last week, which updated the screen usage time, allowing users to set the iPhone’s usage time to a finer time granularity. Users can set a custom downtime for each day of the week, or set a specific day off for a specific day of the week. Simply go to Settings > Screen Time > Downtime to perform a specific shutdown customization service. In the previous system, the shutdown settings could not be specific every day.

For example, if you set the shutdown time to 9:00 pm, then the shutdown time for the week will be 9 pm, but now you can set the shutdown time to 9 pm on weekdays and 11 pm on weekends. point.