The designation that a Jewish person has reached adulthood. Traditionally this is at age 13 for boys/men (Bar Mitzvah) and age 12 for girls/women (Bat Mitzvah). Although a bar/bat mitzvah occurs upon the birthday regardless of whether any ceremony takes place, traditionally the occasion is marked at a service at the synagogue around that time; the honoree will wear a tallit (prayer shawl) for the first time, be called up for an honor (aliyah) for the first time, read from the Torah (first five books of the Bible) and haftarah (a portion of one of the prophets' books, linked to the week's Torah portion), and give a d'var Torah, a discourse on the meaning of the week's Torah portion. A celebratory meal or party often follows. The bar mitzvah for boys dates back to ancient times in varying forms; the bat mitzvah mainly arose in the 20th century. After becoming bar mitzvah, a man is responsible for fulfilling the 613 commandments in the Torah and may be counted toward a minyan (quorum required for certain prayers); in egalitarian movements the same applies to a woman who has become bat mitzvah.