How can I see which week of the year we are living in?
You can enable week numbers by going to;
Outlook 2007 and previous
Tools-> Options…-> button Calendar Options…-> enable option: Show week numbers in the Month View and Date Navigator
Outlook 2010 and Outlook 2013
File-> section Options-> section Calendar-> option group: Display options-> enable option: Show week numbers in the month view and in the Date Navigator