 Megillat Ta'anit contains twelve chapters, each chapter contains the memorial days of a single month, beginning with Nisan (the first calendar month), and ending with Adar.While J. Schmilg argued that these memorial days become festivals by being incorporated and recorded in Megillat Ta'anit, later scholarship has concluded that the days had been known and celebrated by the people long before that time (as Schmilg himself was forced to admit in the case of some of them).The celebration of these festivals or semi-festivals evidently existed as early as the time of Judith.