Hi @Alvaro,
Currently, it is not possible in eazyBI as one week might be split by two months. We have some ideas in our backlog for custom Time hierachie and I added your vote to it as well. But there are no estimates on when it could be implemented.
Meanwhile, in this community post, my colleagues provided a workaround for the current month split by weeks:
best,
Gerda // support@eazyBI.com