I used the suggestion provided by Linc Davis where he suggests moving a list of files from my Library and the Calendar applicaton folder to my desktop. Then I added the files back into the library one by one and was not able to recreate th eproblem. Calendar comes up now and I can enter events woth no problems. I no longer have to do a force quit for calendar application.
A new calendar folder was crteated in my Library preferences folder and the old calendar folder is still sitting on my desktop. I will delete it as soon as I get verfication somehow that it is OK to delete it.
Thanks so much Linc...
the url to Linc's suggestion follows: