The new moon, which marks the beginning of the Jewish month. According to tradition, because women did not participate in the sin of the golden calf, they were given the holiday of Rosh Chodesh. It is customary for women not to work on Rosh Chodesh.
(Judaism) the beginning of each month in the Jewish calendar; marked by a special liturgy
(pl. Rashei Chodashim)(lit., "head of the month"): the first day of each Jewish month
(lit., "the head of the month"): one or two semi-festive days marking the beginning of the month
Means 'head of the month' -- the new month begins when the first sliver of the new moon is seen.
Head of the Month; New Moon First day of the Jewish month, celebrated as a minor holy day; it is observed for one day (if the preceding month had 29 days) or two days (if the preceding month had 30 days). it is celebrated by reciting a short form of the Hallel psalms, reading from the Torah with four persons given aliyot, and adding a musaf prayer. The day is also of special significance for women, especially in the modern period, because of the relationship between the menstrual cycle and the lunar calendar. See further: Rosh Chodesh Index
Lit. first of the month. The first day of a month, on which the first sliver of the new moon appears. See Jewish Calendar.
lit., `head of the month'; pl. Rashei Chadashim: New Moon, i.e., one or two semi-festive days at the beginning of each month in the Jewish calendar.
Rosh Chodesh (or Hodesh; Hebrew: ר×ש חודש, "Head/Beginning [of the] Month") is the name for the first day of every month in the Hebrew calendar, marked by the appearance of the new moon. It is considered a minor holiday, akin to the intermediate days of Passover and Sukkot.Kosofsky, Scott-Martin. The Book of Customs: A Complete Handbook for the Jewish Year.