From a quick look at an Android powered Samsung Galaxy Tab, I've got the impression that there is no way to change that the built-in calendar syncs to Google servers.
Is that so? Has Google hard-wired Google services/servers into Android?
closed as off topic by Diogo, Oliver Salzburg♦, slhck♦, Journeyman Geek♦, Ƭᴇcʜιᴇ007 May 29 '12 at 11:55
Questions on Super User are expected to relate to computer software or computer hardware within the scope defined by the community. Consider editing the question or leaving comments for improvement if you believe the question can be reworded to fit within the scope. Read more about reopening questions here. If this question can be reworded to fit the rules in the help center, please edit the question.
Yes, the default Android calendar application is heavily tied into Google services. To my knowledge there is no way to use other providers with it. But I might be mistaken.
Either way, there are a myriad of calendar applications for Android. Maybe you'll find something more suited for your requirements.