9 And the Lord spoke to Moses, saying, 10 “Speak to the children of Israel, and say to them: ‘When you come into the land which I give to you, and reap its harvest, then you shall bring a sheaf of the firstfruits of your harvest to the priest. 11 He shall wave the sheaf before the Lord, to be accepted on your behalf; on the day after the Sabbath the priest shall wave it. 12 And you shall offer on that day, when you wave the sheaf, a male lamb of the first year, without blemish, as a burnt offering to the Lord. 13 Its grain offering shall be two-tenths of an ephah of fine flour mixed with oil, an offering made by fire to the Lord, for a sweet aroma; and its drink offering shall be of wine, one-fourth of a hin. 14 You shall eat neither bread nor parched grain nor fresh grain until the same day that you have brought an offering to your God; it shall be a statute forever throughout your generations in all your dwellings.
Comment:
Firstfruits is not considered an annual feast but a regular occurence, covering various harvests. In this specific instance it seems to refer to the barley harvest, immediately after Passover. But the term firstfruits is also used in the context of the Feast of Weeks (Shavuot) as well as in many other situations where it is applicable. We have coded it green and amber because it is clear that firstfruits of any harvest are special, but we have no temple/tabernacle or earthly priesthood to which we can bring our firstfruit offerings.