You can try going into system settings > applications > sort by all > calendar > uninstall updates. Be aware that this will not bring back the previously saved dates if those were deleted and will be temporary, since the app will update on it's own again.I would really like to know the same thing because I just put some important dates on my google calendar on the computer not knowing that it would override 6 months of important dates I had on my cell calendar and I want my cell calendar dates back.