What is the best way to determine the week number in my case?

Question

Calendar

I want to celebrate the past weeks like here .
in what way in this case it is better to determine the number of the week
planetcalc.ru/1252
It seems to me that the second method is the most suitable.

Answer 1

already found the solution
correctly will be the first way

Answer 2

Of course, it would be better to go through the official description and try to do it. There is an example of an application / game with the purchase of gas and something else. In general, there is a lot of crap in the settings themselves in the GP, it somehow probably took me a week to figure it out.