Analysis of information sources in references of the Wikipedia article "Shabbat" in English language version.
According to biblical tradition, it commemorates the original seventh day on which God rested after completing the creation. Scholars have not succeeded in tracing the origin of the seven-day week, nor can they account for the origin of the Sabbath.
The more we are able to invest in it, the more we are able to derive pleasure from the Sabbath." Jewish belief is based on understanding that observance of the Sabbath is the source of all blessing, said Rabbi Zippel in an interview. He referred to the Jewish Sabbath as a time where individuals disconnect themselves from all endeavors that enslave them throughout the week and compared the day to pressing a reset button on a machine. A welcome prayer over wine or grape juice from the men and candle lighting from the women invokes the Jewish Sabbath on Friday at sundown.
the sacred seventh-day Sabbaths are forever fixed to the count from one New Moon to the next, causing them to consistently fall upon the 8th, 15th, 22nd, and 29th lunar calendar dates.