There is a "Minhag Tov" for women not to engage as much in Melachah on Rosh Chodesh [Shulchan Aruch, O.C. 417] because, for some reason, Rosh Chodesh is a "woman's holiday." Why exactly is it a woman’s holiday? How exactly did it become one? What can we learn from women's special connection to Rosh Chodesh?