Like all other time-based Mitzvos, women are not obligated (unless they were also saved/part of the miracle).
As was explained to me by my rebbeim over the years:
Men generally require “action” in order to connect to Hashem, since men are action/goal-based beings. Women don’t need these activities to feel the connection to Hashem, since they are emotional beings, and can maintain a high-level emotional connection to Hashem without physical activity. Men can be considered somewhat lacking, since they require much effort to attain levels that women can very easily obtain.