Vayak'hel-Pekudei 5773

The posuk (35:25-26) says that the women of Bnei Yisroel also worked on the Mishkan. The Rosh explains that when the men came to ask their wives to donate their jewelry for the mishkan, the women gave with happiness and zealousness. This is opposed to when the men had to forcefully take their wives' jewelry in order to make the golden calf. Because of their actions, the women merited not doing work on Rosh Chodesh of every month; it became a yom tov for them.