I stood in Superior Court and swore that my marriage was irretrievably broken. I rebuilt myself and remade my life. I've made new friends, live where I'd always wanted to live, and am altogether happier than I ever was back then.
You'd think this would be a more important anniversary, but most years it passes unremembered. Recently someone was asking about my past, which caused it to come to mind. That and my building's windows are being washed the same day, and repeatedly seeing the notices jogged my memory ;)