Today marks the beginning of a rather popular Roman festival in honor of Ceres, Goddess of grain and agriculture, Ludi Cerealis. While the date is often disputed whether it started on the 12th or ended on the 19th or maybe it started on the ides of April, (the 7th), it is commonly referred to as starting on the 12th or sometimes 13th of April. Women in white carrying torches symbolized Ceres' search for her lost daughter, Prosperpine. It was a seven-day long festival where games were held in Ceres' honor at the Circus Maximus. While the public was in mourning though, the games and celebrations were not held.
The end of the festival marked Prosperpine's return to the earth after her stint in the underworld, no blood sacrifices were allowed during the time of the festival, except of a female pig or sow.
Sources:
http://penelope.uchicago.edu/Thayer/E/Roman/Texts/secondary/SMIGRA*/Cerealia.html
http://www.perseus.tufts.edu/hopper/text.jsp?doc=Perseus:text:1999.04.0063:id=cerialia-cn
Blessings,
Petra