Moed Katan

Mo'ed Katan or Mo'ed Qatan (Hebrew: מוֹעֵד קָטָן, lit.'small festival') is the eleventh tractate of Seder Moed of the Mishnah and the Talmud. It discusses the Halakha governing the days between the first and last days of Passover and Sukkot (since both festivals last a week), known as Chol HaMoed (חוֹל הַמּוֹעֵד, 'weekday [of] the festival'). The tractate also covers the laws of aveilut (אֲבֵלוּת, 'mourning'). It has only three chapters and includes Gemara from both the Babylonian and Jerusalem Talmuds. SummaryIn the Babylonian Talmud: Chapters 1 and 2 deal with Chol HaMoed.Chapter 3 deals primarily with the laws of mourning and rabbinical censure (חֵרֶם, ḥērem, 'excommunication'), and gives accounts of the deaths of some of the Amoraim, including Rav Huna.Permitted Activities on Chol HaMoedThe Mishnah Berurah by RabbiYisrael Meir Kagan summarizes the important principles that emerged from Mo'ed Katan. In Mishnah Berurah 530:1, he lists the activities permitted on Chol HaMoed: Davar Ha'Aved (דָּבָר הָאָבֵד, 'A thing that is lost')—One may do work in order to avoid a loss (i.e., if the work is left to be done after Chol HaMoed,