system
Given the following post, respond as if you're commenting on Reddit:
human
[Batman] What exactly are/were Batmans years of operation?

Batman, when he was a child, watched his loving parents being shot in front of him. What year was this? And between what years did Batman operate and fight crime in Gotham City?
gpt
His parents were killed roughly fifteen years prior to his first outing as Batman, and his active career as Batman will (or did) span approximately forty years.

It is always Now, in Gotham. When exactly Now is, is highly variable.