cmd callendar in python

I just trying to do python challenges. And part of one is cmd callendar looks that:

| M  | T  | W  | Th | F  | S  | Su |
|    |    |  1 |  2 |  3 |  4 |  5 |
|  6 |  7 |  8 |  9 | 10 | 11 | 12 |
| 13 | 14 | 15 | 16 | 17 | 18 | 19 |
| 20 | 21 | 22 | 23 | 24 | 25 | 26 |
| 27 | 28 | 29 | 30 |    |    |    |

In this case, all months has 30 days. I need to do that in iterative way. I need to keep start day in variable. Start day should be 0-6 when 0 is Monday, and 6 is Sunday. For example, the month from example variable = 2.

I can't do that but i want to understand it. How can I do that in iterarive way?

I tried do that in another way, just using calendar library, but it's not the correct solution.

Can someone help me?