The new Thunderbird has a calendar program that stays on your computer(not on the internet as Yahoo and Google) but it can pull in the info from the calendars on the internet (Yahoo is one of interest to us). It still does not give me a good printing format but what it does is make this info available on a sidebar if you want it any time you are in your mail program. Also you can click on the calendar at top and see a good copy of our stuff. Of course it has taken a long time to figure it out and get it set up for me. Not sure you want this but it is neat to have the calendar info beside me when doing emails . There are some things I do not understand about it but I am learning.
All this is FYI in case you might be interested after I Learn more about it.
Below is what it looks like on my computer
don
This is the Thunderbird calendar 
http://donredding.com/pptest/d300f7c66b9142ad8d07355ccabeffe7.jpg
This is the top of your mail program with the calendar tab showing:
http://donredding.com/pptest/413373c2feae4c24b541db0e1ee2214e.jpg
This shows more of what it looks like when doing email work: (scrunched it smaller)
http://donredding.com/pptest/fc6f739a2e1a477cbe4e1924eb10f385.jpg
