Hello, im new on this jam, i wanted to know, i only have one week of availability, does the jam allow me to take one week instead of two, and mention it in the submission so that it’s taken in count ?

I am not the host of this jam but I can say that you can. You can even publish your game earlier: just don’t forgot to set your game as public. It is not set as public by default.

Yep, the jam is ten days long but really it's designed to be laid back adn relaxing. You can ask for a late submission if you want to work on your entry a bit more. And you can submit earlier if you like too!