Xiaomi
Change Calendar View auf Xiaomi
The Google Calendar app that ships with newer Xiaomi phones remembers only one view at a time, and it usually falls back to Month after a restart. That happens because the app stores the last selected layout locally, not through a MIUI setting, so a system update or a cleared cache can reset it. Switching manually takes a few taps but does not stick unless you pick the view again each time you open the app.
To change the layout, open the calendar and tap the menu icon in the top-left corner. From there you can choose between Schedule, Day, 3 Days, Week and Month. Schedule works best for scanning upcoming appointments as a list, while Week and Month suit longer-term planning.
Path: Tap on Calendar ➤ Open the Menu ➤ Choose an option
If the view still resets after closing the app, check whether Calendar has background data restrictions in your battery settings, since that can stop the app from saving your last used layout. This setting only affects Google Calendar; other calendar apps on your Xiaomi phone keep their own separate view preference.