This cannot be done with Outlook's built-in print styles.  You might want to
take a look at some free Word templates that use your Outlook calendar data
to create a calendar in Word, which you can then customize to your liking.  I
personally use "My Outlook Calendar" and am very pleased with it -- and it
will print the previous and next month "thumbnail" calendars above the
current month.  Links to these templates can be found here:

http://www.slipstick.com/addins/calendar.htm#print