The calendar is displaying days of the week in a foreign language, how do I change it to english?
Edit: In response to a comment below, this question is not a duplicate of How to change Date/Time format to English?. That thread is 9 years old and the answer refers to a system setting from ubuntu 13, "Language Support", which no longer exists in ubuntu 20.
Edit #2: I posted this question in March and only today noticed that it received a reply in October. Here is the output from locale:
$ locale | grep LC_TIME
LC_TIME=en_US.UTF-8
In the meantime, the problem went away and my calendar is now displayed in English. I did not knowingly change anything, maybe the problem got fixed by an update.