Now that we've beat this to death. The Replacements.
by R. Proffitt - 3/24/13 1:02 PM
In Reply to: Calendar Apps Sync Problems (Galaxy S) -- Fix Needed! by WDC200236
Look at https://www.google.com/search?hl=en&as_q=better+android+calendar
The first hit is 10 of the top replacements and many have free versions. Some like Jorte/Jarte? have their own cloud since Google tends to break things at times.
Hope this helps,