Samsung Galaxy S3 calendar sync

A

AC Question

Hi there,
I have the S calendar and google on my phone but I don't use the latter. My problem is the calendar will only sync one year's events. As each month passes a month's worth of my entries disappear. At the moment all my entries (other than events like birthdays that occur annually) before July have now gone and July will disappear as we move into September. This is very frustrating. Any advice would be most appreciated. Thanks Caroline