YES - you can share a calendar as a "read only" calendar (they will not be able to make changes). To do this (if you want to) select the calendar that you want to share / right click on it / select "publish" / give party url to your published calendar and they will be able to view it in their browser. I hope this helps - MERRY CHRISTMAS
FYI - this is using Apple iCal - I forgot to mention that - sorry...