Hope you won't hate us for that! You are now able to work on weekends and register weekly timesheets on Saturdays or Sundays. You can parameter those two events in the company configuration area by selecting the checkboxes related to work on Saturdays and Sundays.
Timesheet, team management, and project forms will take this new configuration into consideration in order to show weekend dates or not. The definition of weekly hours will also be affected taking into consideration the new configuration.