How to customize Android calendar?

Question

Android

Greetings to all, I have a problem in front of me to solve which I need valuable advice from an experienced Android developer. Is it possible to fully customize the Android calendar as in the picture below.

The figure shows the first state of the calendar (the state before scrolling the ListView).

And here the days of the calendar have already appeared after the ListView scrolled to the end. And yes, the icon of each day displays a small schedule of workload in different colors.
After all, the final question is described. Is it possible to change the structure of the UI android calendar or do I need to develop my own calendar, which I really don’t want to.

Answer 1

All Android sources are available through the AOSP project.
No one bothers you to download the source of the calendar and correct it as you wish.