Hi, I have 2 problems, and 3 questions:

1. The class schedule situation is displayed correctly on computers in high resolutions.
The days of the week are in the full (expanded) version starting with Monday, Tuesday ... etc.
https://zapodaj.net/99682c714e18d.png.html
As you can see on mobile devices, it does not fit a whole week.
https://zapodaj.net/78b80320b635a.png.html
a) I would like to shorten the names of the days of the week to: Mon, Tue etc- How to do it?
b) In the mobile version, I would like to delete the days of the month when there are no classes. Remove: Wednesday, Saturday, Sunday- How to do it?

2. There is an incorrect time in the event summary.
https://zapodaj.net/7e560b672d96b.png.html
It is: Śr Paź 21 @12:30 - 01:30PM
It should be: Śr Paź 21 @12:30 - 13:30
As you can see, there are shortened days of the week in this record. Where is the mistake? What should I do?

Thx for help