I store dates in a core data entity attribute, I then display the date in the table cells. I want to group all the cells according to months and only display the relevant da
Apple has a really great sample showing exactly how you can achieve this. I think it is what you are looking for.
Check out: http://developer.apple.com/library/ios/#samplecode/DateSectionTitles/Introduction/Intro.html#//apple_ref/doc/uid/DTS40009939