Question: When does Shabbat begin and end each week?
Answer: The Torah describes creation, "And there was evening, and there was morning, one day." Thus, according to Judaism, a new day begins in the evening, at sunset.
The Jewish Sabbath (Shabbat), like all Jewish days, begins at sunset. Shabbat ends at nightfall, when three stars are visible, approximately 40 minutes after sunset.
HebCal.com offers 1-Click Shabbat Candle Lighting Times so people can easily find when Shabbat begins and ends each week in their area.