Makes me think they might make Keaton's Batman younger than he is.
Using the Wayne death newspaper as a guide, Thursday October 19 matches with a few dates that seem reasonable, and deducting 8 years because he was 8 years old in the Burtonverse:
1961 - 8 = 1953
1967 - 8 = 1959
1972 - 8 = 1964
1953 Birthday (Closest to Keaton's 1951 birthday)
1953 + 36 = 1989
1953 + 39 = 1992
1953 + 69 = 2022
1959 Birthday
1959 + 30 = 1989
1959 + 33 = 1992
1959 + 63 = 2022
1964 Birthday
1964 + 25 = 1989
1964 + 28 = 1992
1964 + 58 = 2022
If I made him any younger, he'd be 19 in Batman (1989) which is absurd. Included Schumacher because Pre-Crisis.
1964 actually seems more comic accurate, too. Don't think Keaton looks 25 in Batman (1989), but close enough.
Wasn't Frank Miller's Batman in his 50s in The Dark Knight Returns? Some argue Batman is in his 50s in Titans, too. I think it works. Keaton looks good for his age, and Batman realistically will look older than he is anyway due to the stresses of being Batman.