普通版：The end of an era in my world. (end+ of 的介词搭配更常见） 文艺版：The end of an old chapter in my world. (或者可以用 turn to new page 之类，不一定拘泥于 直接翻译的 era，直翻不一定精准也不一定通顺适合） I'm glad to provide u with some help. :)

My world is the end of an era

The end to an era in my world.