Albums have birthdays, see, and they're always a special time for the album and its fans.

So what is it for you? The subtle frisson of a 2-year anniversary? The fruity pang wafting to your nose a half-decade since the original funk? A decade's reminiscence? Fifteen? Twenty? Silver, gold or diamond Jubilee?

When does an album's birthday really fill with meaning for you, or does it depend on the album?