The trouble is that it gets the data from somewhere else. So I looked through all the strings in the Always On Display app, com.samsung.android.app.aodservice.apk and the Samsung calendar app, com.samsung.android.calendar,
as well as the Calendar storage com.android.providers.calendar.apk, and found some specific "All day" strings, but none that affect the text I want to change. Any ideas about ways to track down strings are also appreciated! I've thought about using AppLocale2 to try to change the language of different apps for example, and see if it changes anything.