First Fruits is a set-apart day unto Yahuah that most people forget about. It is a wave offering that only the High Priest/Kohen can offer on the third day of Unleavened Bread. Yahusha is our High Priest/Kohen now. He rose on the third day and waved his offering before Yahuah on our behalf for our acceptance.
First Fruits is a day of rejoicing and worship. We are to keep this day forever and not forget it. After this Festival we are to start the count of the Omer to Shabuot/Pentacost seven sabbaths later.