John 7:2
7:2 feast of Tabernacles One of the three pilgrimage festivals when Jews were to travel to Jerusalem if possible. It was celebrated in September or October, about six months after Passover (March-April), and two months prior to the feast of Dedication.
It is called the “Feast of Booths” because people lived in leafy shelters to remember God’s faithfulness to Israel during her wilderness wanderings (Leviticus 23:42-43; cf. Matthew 17:4)
It was also a time of celebration and thanksgiving for the harvest (Leviticus 23:39-41; Deuteronomy 16:13-15; cf. Exodus 23:16; Exodus 34:22)
Feast of Tabernacles -- sometimes translated "festival of shelters" by modern translations (NTL), or "feasts of booths" (ESV).
It began on the fifteenth day of the seventh month (Tishri), i.e., mid-October, five days after the Day of Atonement (Tishri 10 - late September or early October).
The feast was celebrated against a background of rejoicing for divine blessings, represented by the bounty of the year’s harvest.
By NT times it had become a custom on that feast for a procession to visit the Pool of Siloam and return with water, which was then poured out as a libation of thanksgiving to God.
8:12 I am. The light metaphor is steeped in OT allusions (e.g., Exodus 13:21-22; Psalms 27:1; Psalms 119:105). Jesus is the promised light (Isaiah 9:2; Isaiah 42:6; Isaiah 49:6; Isaiah 60:19-20; cf. Acts 13:47).
8:12 During the Festival of Shelters, sixteen gold bowls in the inner courts of the Temple were filled with oil and lighted. Jesus stood beneath these lights in the Temple (John 8:20) and said that he was now the source of the light.
Now, the lighting of the giant lamps reminded the nation of the pillar of fire which guided them at night (cf. Exodus 13:21; Numbers 9:15-23
How fitting that during the Feast of Tabernacles, when the large lamps were burning, Jesus … said, I am the Light of the world (cf. John 1:4, John 1:9; John 12:35, John 12:46)