A new feature in iOS 13 and iPadOS is the ability to have Shortcuts trigger automatically, at a certain time of day, when you launch an app, change a setting or move to a new location. You can use this to make Shortcuts much more useful. Take a look at two quick examples. The first simply forces the Calendar to jump to the current day every time you open it. The second will display a special Reminders list when you turn on Do Not Disturb, but only if there is at least one item in that list.