Calendar on small displays is not completly visible in vertikal view
Summary
Calendar on small displays is not completly visible in vertikal view. In the horizontal view it can be accessed completely.
Steps to reproduce
Add a new Slot in any Shop e.g. on a Xiaomi Mi A1 with 5.5 Zoll HD Display, 1.080 x 1.920 Pixel
Open the calendar for date of slot
What is the current bug behavior?
sunday isn't shown on calendar (see screenshot)
What is the expected correct behavior?
make a guess
Relevant error messages and/or screenshots
