The concept of "Mars vs Venus" as a way to describe the differences between men and women is not a specific, formally created concept with a single origin date. It's a cultural phenomenon that evolved over time, drawing from various sources.

However, a key moment in its popularization was the publication of John Gray's book "Men Are from Mars, Women Are from Venus" in 1992. This book, which became a bestseller, solidified the "Mars vs Venus" metaphor in the public consciousness, despite some criticism for its potentially simplistic and stereotypical portrayals.

Therefore, while the idea of gender differences has existed for centuries, the "Mars vs Venus" terminology and its widespread use can be attributed to Gray's book, published in 1992.