 Passover. The women were responsible for taking over, preparing for Passover, and then they in secret would have a Seder, and the women took care of all of this. When men were out in the world, they could have been identified. It was riskier for them. And in the home, quietly, privately, keeping some of these traditions was easier. But for 500 years? Yes, a long time. It is a long time.