Monthly Calendar view is hard to read due to white text
Change the text in calendar month view to black instead of white so it is easier to read
cold case commented
Are you using Outlook Android app in latest version 4.0.57 (367)? You can find the version info in help section when you scroll down to the end of page.
My fond color is black and the day numbers in calender (month view) are grey.
Have you tried in options-dialog under design: "Dark" (Background)?
Finn Hove commented