Judaism has about 12 million followers throughout the world, including some 185,000 practising Jews in the UK. During the Holocaust of the 1930s and 1940s, over 6 million Jews were murdered.
Judaism is based on the belief that there is only one God. The most holy Jewish book is the Torah (the first five books of the Hebrew Bible) which was revealed by God to Moses on Mount Sinai over 3,000 years ago. The Torah, together with the Talmud (commentary on the Torah), give the Jewish people ethical rules for everyday life. Observing these rules is central to the Jewish religion.
The family and community are very important within Jewish life. The most important day of the week is Shabbat (the Sabbath), which is a day made holy by refraining from weekday work. At the beginning of Shabbat the family share a meal. Shabbat starts on Friday evening and ends at sunset on Saturday. During Shabbat, services are held at the synagogue, often led by a Rabbi (literally 'teacher'). The Rabbis of the Talmudic period deduced from the Torah the kinds of work Jewish people are not allowed to do during Shabbat. They include writing and carrying. Orthodox Jews follow this way of life.
There are many religious festivals throughout the year. Some of the important ones are Pesach (Passover), Rosh Hashanah (the New Year),
Yom Kippur (the Day of Atonement) and Hanukkah (the Festival of Lights). The emblem of the Jewish people is the Magen David (Shield of David), also known as the Star of David.