Patti Wigington at Paganwiccan.about.com wrote this nice little description about Matronalia:
In ancient Rome, the holiday of Matronalia was celebrated each year at the beginning of March. This annual "festival of women" was held in honor of Juno Luciana, a goddess who watched over married women and those in childbirth. This aspect of Juno was associated with childbirth. The name lucina was thought to have come from the Latin word lux (light); thus, when a child was born it was said to have been “brought to light”....
... I am so sorry to do this to you, but this post has been moved to my new website, Pagan Calendar, and can be found in its entirety here: Celebrating Matronalia
As you explore this site, you may find links to a "page not found" instead of something cool and magickal. For this I apologize. I am very working hard behind the scenes to restore those pages along with a link to their homes on my new website where they can be viewed in full.