"Shabbat", the weekly day of rest lasting from shortly before sundown on Friday night to nightfall on Saturday night, commemorates God's day of rest after six days of creation. It plays a pivotal role in Jewish practice and is governed by a large corpus of religious law. At sundown on Friday, the woman of the house welcomes the Shabbat by lighting two or more candles and reciting a blessing. The evening meal begins with the Kiddush, a blessing recited aloud over a cup of wine, and the Mohtzi, a blessing recited over the bread. It is customary to have challah, two braided loaves of bread, on the table. During Shabbat, Jews are forbidden to engage in any activity that falls under 39 categories of "melakhah", translated literally as "work". In fact the activities banned on the Sabbath are not "work" in the usual sense: They include such actions as lighting a fire, writing, using money and carrying in the public domain. The prohibition of lighting a fire has been extended in the modern era to driving a car, which involves burning fuel and using electricity.