This sugya discusses the concept of reciting Havdalah on Motzei Shabbos (and Yomtov). One of the sources for Havdalah is found in Parshas Yisro - from the passuk "Zachor Es Yom Hashabbos L'kadsho". We discuss the machlokes amongst the Rishonim as to the exact source of this chiyuv and if it is a chiyuv min HaTorah (similar to kiddush marking the onset of Shabbos). We also discuss various ramifications to this machlokes, such as whether women are also obligated in Havdalah, as they are by Kiddush. We also touch upon the minhag that women don't drink from Havdalah and its sources in Halacha and Kabalah.