====Who Should Fast====
#There is a custom to fast on Erev Rosh HaShanah.<ref>Shulchan Aruch Orach Chaim 582:2</ref>
# Where there is a Brit Milah that day, one may eat.<ref>Rama, Orach Chaim 581:2</ref> Some are of the opinion that one can exempt himself with a
siyum<ref>Orchot Rabbeinu Vol. 2, pg 172 in the name of the Steipler Gaon. Elef HaMagen S"K 77.</ref> or any other Seudat Mitzvah,<ref>Magen Avot (Lebhar, Orach Chaim 581:2</ref> as well.
#Some say that the minhag is that women do not fast on [[Erev Rosh Hashana]]. <ref>Mishna Brurah 581:16 writes that women also fast, but [http://www.theyeshivaworld.com/article.php?p=69877 Rabbi Yissachar Dov Krakowski] says this isn't the custom. </ref>
====Accepting the Fast====
#One doesn't need to have to accept this fast upon himself during [[Mincha]] the day before. <ref>Mishna Brurah 581:16, [http://www.theyeshivaworld.com/article.php?p=69877 Rabbi Yissachar Dov Krakowski]. This is also the ruling of [http://www.dailyhalacha.com/Display.asp?ClipDate=9/15/2009 Rabbi Eli Mansour] However, [http://revach.net/halacha/tshuvos/Rav-Elyashiv-On-Fasting-Erev-Rosh-Hashana/1020 Revach.net] quotes Rav Elyashiv as saying that if you don't fast every year, you should accept it during [[mincha]] the day before. </ref>