Rosh Chodesh is the holiday that marks the beginning of eleven of the twelve months in the Luach, the Jewish calendar, with of course the exception of a Shanah Meuveret, a leap year. A leap year has thirteen months and therefore twelve of those months have a Rosh Chodesh. Sometimes Rosh Chodesh is one day, sometimes it is two days.
Rosh Chodesh is a holiday that honors women. Why? In the Torah, Shemot Exodus Chapters 32 to 34 Bnai Yisrael, the Children of Israel, commit the Avayrah, the sin of building the Egel Hazahav the Golden Calf and worshiping it. According to the PIRKEI D’REBBI ELIEZER Chapter 45, the holiday of Rosh Chodesh was given to women as a day off, a reward for refusing to give their jewelry to their husbands who wanted to use it to make the Golden Calf.
It would seem that the men and boys did give their gold and Jewelry towards its construction. Even Aharon Hakohen, the Kohen Gadol, the High Priest of the people and the brother of Moshe, Moses. One of the holiest people in the nation, not only participated but actually constructed the Golden Calf. Now it is possible that his life was threatened if he did not build the Golden Calf. Maybe he only helped to build the Golden Calf to connect the people to God. Perhaps he did not want them to worship the Calf. His goal was to use the Calf as a way to pray to God. It is also possible that they were worried about Moshe being gone for so long on Har Senai, Mount Sinai and they needed something to comfort them. However, in the end, Aharon went about this in the wrong way but the women did not. Therefore, this is why Rosh Chodesh is a holiday that honors women and has become almost a quasi Yom Tov, holiday for women. Serving as vacation day for the Jewish women of the world. Jewish women and girls take this day for your self, not just as a day of relaxation but of reflection as well. Jewish men do something special for the different women in your life.