A 7-day week justifies an use of a solar calendar for Jews; having the first and the last day of one vague year the same day of the week, there are only seven year typologies which can be identified by the name of the days of the week. A rare prayer, Birkat Hachama (said once every 28 years) suggests to insert a week once every 28 years, obtaining the same accuracy of the Julian year. Leviticus leads to a 7-Jubilee cycle, with the same rhythm of the week, and an important seven century cycle which Odyssey book XII deals with; according to Psalm 90 the millennium cycle is still organized like a week, but with an inverse path. Six candle lighting paths in the menorah show important cycles like years, decades, centuries, millennia, … to continue, without an end, through millions, … trillions years in a long count calendar; this unlimited cyclic nature, which can be better understood using a Solomon’s seal like a “closed” menorah, requires an exact value of the sidereal solar year. Exodus 26 inspires the insertion of another week once every 1,120 years, to define a quasi-sidereal Tabernacle year; in Genesis 6, at last, there are logical ties with a perfect sidereal solar year which needs the insertion of further week once every 62,720 years. So adding a whole week once every 28 years, 1,120 and 62,720 years we can reach a perfect value of the sidereal solar year, using a unique 7-year calendar, simply organized like a week.
KEY WORDS: ark, calendar, jubilee, millennium, precession, tabernacle.