You sure can! To change the day of the week on which your calendar view begins (left column), do the following:
- Click your name in the top right and select 'My Profile'.
- On the General Settings tab, click the blue Edit button that appears next to your name.
- Find the "Start Week On" dropdown and select your desired day of the week.
- Click the green Save button.
Your chosen day will now be the leftmost column within your month and week calendar views.