The Biur Halacha in Siman 299 brings an interesting opinion from the Magen Avraham. If someone was fasting (and had taken on to fast for a few days) and wasn't able to make havdallah Motzei Shabbos ...
Update: After speaking to the person who originally asked the shailo I have since updated the question to reflect what their original kavana was. When Yom Tov comes out Motzei Shabbos when we make ...
Before a woman lights candles for Yom Tov that falls out on Motzei Shabbos does it say anywhere that she needs to say "HaMavdil" first? (Since the kedushas are different -- on Shabbos it was ossur to ...