From my own personal experience, at least six years ahead, but if that far most likely further to. I think when we get a reading and it predicts things happening, they can happen at anytime. that is what happened to me.
I did a reading for myself and it came up that i would end my marriage and move overseas. I laughed and said "yea right" lol. i was in a happy marriage, life was good. But six years later I did exactly that and didn't even think about my reading until a year after my divorce, then it flashed in my mind and I was like "darn, tarot is good isn't it? " lol.