When did the joker and Harley Quinn start dating?

Answer 1

The Joker and Harley Quinn first met when Harley was working as a psychiatrist in the Arkham Asylum. Harley was warned about the Joker, but she made a session with him anyways. He told her everything she wanted to hear, like lies about his past (abusive father, runaway mother, it's different depending on what you're reading or watching) and he told her he liked her name, Harleen Quinzel, or Harley Quinzel because it was like the clown character Harleqiun. She soon falls in love with him and becomes Harley Quinn. She changed her name so it was more appealing to the Joker and she busted him out of the asylum. They've been, well, 'dating' from then on in an abusive manipulative relationship.

Answer 2

Harley Quinn was Dr. Harleen Quinzel whom met the joker while working as a psychiatrist at Arkham Asylum. She was cautioned not to work with the Joker but took on the case to gain publicity and she fell in love with him after hours of sessions in which he wove a sad tale about an abusive father.

Answer 3

Harley Quinn was created in 1992.