According to the King James Version of the Bible, the eighth day of the Feast of Tabernacles is mentioned in Leviticus 23:36. The verse states:

“Seven days ye shall offer an offering made by fire unto the LORD: on the eighth day shall be an holy convocation unto you; and ye shall offer an offering made by fire unto the LORD: it is a solemn assembly; and ye shall do no servile work therein.”

This verse indicates that on the eighth day, following the seven days of the Feast of Tabernacles, there is a holy convocation or special gathering. Offerings are made by fire to the Lord on this day as well. It is referred to as a solemn assembly, and the people are instructed not to engage in any regular work on that day.

The significance of the eighth day is often interpreted as representing a new beginning or a separate celebration following the completion of the seven days of the Feast of Tabernacles. It is sometimes referred to as “Shemini Atzeret” in Jewish tradition, which means “the eighth day of assembly.”

Leviticus 23:34 introduces the commencement of the Feast of Tabernacles with these words:

“Speak unto the children of Israel, saying, The fifteenth day of this seventh month shall be the feast of tabernacles for seven days unto the LORD.”

Hence, as per the King James Version of the Bible, the Feast of Tabernacles initiates on the fifteenth day of the seventh month according to the Hebrew calendar.

Leviticus 23:36 refers to the Feast of Tabernacles, also known as the Feast of Booths or Sukkot. Often called a Jewish festival, God clearly states that these are his feasts in Leviticus 23:2, “Speak unto the children of Israel, and say unto them, Concerning the feasts of the Lord, which ye shall proclaim to be holy convocations, even these are my feasts.

The Feast of Tabernacles is observed on the 15th day of the seventh month, which typically falls in September or October.

During this festival, the Israelites were commanded to dwell in temporary booths or shelters (sukkahs) made of branches and foliage. This practice served as a reminder of when the Israelites wandered in the wilderness after their exodus from Egypt, living in temporary shelters. Leviticus 23:36 (KJV), states: “Seven days ye shall offer an offering made by fire unto the Lord: on the eighth day shall be a holy convocation unto you, and ye shall offer an offering made by fire unto the Lord: it is a solemn assembly, and ye shall do no servile work therein.”

This verse outlines the duration of the festival, which is seven days, followed by an additional holy convocation on the eighth day. The Israelites were to offer sacrifices and refrain from work during this period The Feast of Tabernacles was a time of thanksgiving to God for His provision, protection, and harvest blessings. And is a shadow of its ultimate fulfillment in the Millennial Kingdom. 

The prophet Zechariah wrote that during the Millennial Kingdom, all the nations of the earth will keep the Feast Of Tabernacles. Zechariah 14:16-19 states: 

“And it shall come to pass, that every one that is left of all the nations which came against Jerusalem shall even go up from year to year to worship the King, the Lord of hosts, and to keep the feast of tabernacles.

And it shall be, that whoso will not come up of all the families of the earth unto Jerusalem to worship the King, the Lord of hosts, even upon them shall be no rain.

And if the family of Egypt go not up, and come not, that have no rain; there shall be the plague, wherewith the Lord will smite the heathen that come not up to keep the feast of tabernacles.

This shall be the punishment of Egypt, and the punishment of all nations that come not up to keep the feast of tabernacles.

The Eight Day of the feast, which is also a holy convocation, is also a shadow of a glorious event that looks beyond the millennial period to the Kingdom Of God when the Father dwells with us.