Hi @David_Harding and thanks for reaching out!
As it stands, it is not possible to switch to a weekly view, however I would encourage you to add your comment and vote on this thread from our #productfeedback category: Hourly, weekly, daily - calendar views for projects please :-)
Note that you can include weekends in your Calendar and save this view for everyone. More info:Creating default calendar views - #2 by Marie
Hope this helps!