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
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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.