Option to set Start Day of the Week to Mondays in Pivot Tables

Feature Requests
1

We use pivot tables and often organize results by week, but the system automatically has weeks start on Sundays. Would be nice to have an option whether it starts a week on a Monday or a Sunday. We would want weeks to start on Mondays so work done over weekends doesnt get split to 2 different weeks and would just make weekly work easier to track.