They aren't all "feasts." Yom Kippur is a solemn fast day. All the others, in addition to their festive meals, are marked by prayers and Torah-readings.
Each festival has its specific laws:
Leviticus 16:29 and 23:27
Traditional chronology places Leviticus 23 in 1312 BCE. See also the Related Link.More about the contents of Leviticus 23
Seven days, compared to eight in the Diaspora.
God (Leviticus ch.23).
It was not. Leaven was barred from all meal-offerings(Leviticus ch.2) with one exception (ibid. ch.23). I don't know of a simple reason; but on a slightly esoteric note, leaven symbolizes the Evil Inclination (Talmud, Berakhot 17a).
According to the Book of Leviticus God of Israel gave them a number of feasts that are holy convocations or holy assembles. There are seven feast days, they are found in Leviticus 23:4-44.The seven feasts are usually listed as:PassoverUnleavened BreadWave SheafPentecostTrumpetsAtonementTabernaclesThere are also seven yearly Sabbaths, which God commands Israel to keep as holy convocation or holy assembles.The seven yearly Sabbaths are:First Unleavened BreadSecond Unleavened BreadPentecostTrumpetsAtonementTabernaclesWhat makes the commandment weekly Sabbath a high day is when one of the yearly Sabbaths aliens and coincides with the weekly Sabbath, this is what makes a weekly Sabbath a high day or great day.Last Day
God, in the Torah (Leviticus ch.23).
In the wilderness (Leviticus ch.23).
The Chew - 2011 Fabulous Fall Feasts - 3.11 was released on: USA: 23 September 2013
The "Jewish celebrations" are listed in Leviticus 23.The Bible calls them the "Feasts of the Lord"... not the "Jews":"...say unto them, Concerning the Feasts of the Lord, which ye shall proclaim to be holy convocations [assemblies], even these are My Feasts." (Lev.23:2)However, the Jews are, primarily, the only ones keeping them today, with a smattering of others who recognize them as all "Christ-centered" observances [Jesus Christ, being the Creator God of the Old Testament who made all things - John 1:3].Besides the weekly seventh-day Sabbath... the "annual feasts" in Leviticus 23 are also called "Sabbaths" or "High Day Sabbaths."They are divided into two seasonal groups; 1)- the spring or early harvest season: The Passover, the Days of Unleavened Bread, Pentecost. And 2)- the fall or latter day harvest season: the Feast of Trumpets, the Day of Atonement, the Feast of Tabernacles, and the Last Great Day.There are seven of them... and they reveal the "plan of God" to those with the eyes to see. But WHEN they fall varies each year... because God's year begins in the "Spring" [when life begins anew] -- which may be early or late from year to year.The world today doesn't set its clocks by God's time table... but some calendars may have the "Jewish" celebrations included on them... and the Internet has many an offering on it to track down when they fall in any given year.There are other "celebrations" which the Jews have instituted as the generations passed... and some are recorded in some of the Bible's historical accounts. But the ones that God commands of His people are found in Leviticus 23.
The Chew - 2011 Fabulous Fall Feasts 3-11 was released on: USA: 23 September 2013
Yom Kippur is from the Torah (Leviticus ch.23).