Plus, he said something to the effect of he's now older than his father was and Thomas was 39 when he was killed. So by BvS, he's in his early to mid 40s. I would put him at 44-45 in JL. So I would guess he started as Batman in the mid-90s, met Dick Grayson around 1999/2000, worked with him to maybe mid-2000. Then Jason after that and Joker and Harley kill him around 2010-2011.
Oh, crap. I'm a mess right now. Something in the Politics thread triggered me big time and I'm having flashbacks and bad thoughts. I hope the thread is closed. It's bringing out the worst in otherwise decent people.