FIRSTFRUITS

The last possible date for the Jews to offer FIRSTFRUITS to the Lord was during the Feast of Hanukkah.

Revelation 14: Then I looked, and there before me was the Lamb, standing on Mount Zion, and with him 144,000 who had his name and his Father’s name written on their foreheads. And I heard a sound from heaven like the roar of rushing waters and like a loud peal of thunder. The sound I heard was like that of harpists playing their harps. And they sang a new song before the throne and before the four living creatures and the elders. No one could learn the song except the 144,000 who had been redeemed from the earth. These are those who did not defile themselves with women, for they remained virgins. They follow the Lamb wherever he goes. They were purchased from among mankind and offered as firstfruits to God and the Lamb. No lie was found in their mouths; they are blameless.

According to rabbinic interpretation the duty of bringing first fruits was confined to the seven distinct species growing in Erez Israel, i.e., wheat, barley, grapes, figs, pomegranates, olive oil, and dates (“honey”). The fruits were given to the priests after the donor had recited the confession (Deut. 26; 1–11) acknowledging God as the one who redeemed the Israelites from the Egyptian bondage, and expressing gratitude to God who brought them to the Promised Land. The bikkurim were brought between Shavuot (hence its designation as Hag ha-Bikkurim—“the first fruits festival”) and Sukkot. The firstfruits could be brought as late as Hanukkah, but after Sukkot no declaration was made.

Mishna, Tractate Bikkurim 1:6
From the reaping [ie: from Shavuot] until the festival [ie: until Sukkot], he brings [the first fruits to the priest] and he recites [the traditional formula], but from the festival [of Sukkot] until Hanukkah he brings [the first fruits to the priest] but he does not recite [the traditional formula].