Why is only Shabbos Breishis known as Shabbos Breishis. (As opposed to any other week - we do not call Shabbos Noach etc.)
Someone showed me a Divrei Chaim that asks this question and answers as follows. During the month of Tishrei people take upon themselves to better themselves. To remind people that they are starting with a clean slate we call this Shabbos "Shabbos Breishis". Just like by Breishis everything started anew, the same is now with us.