one day in the year in this month they shall celebrate the festival.
For it is the feast of weeks and the feast of first-fruits:
this feast is twofold and of a double nature: according to what is written and engraven concerning it celebrate it.
For I have written in the book of the first law, in that which I have written for thee, that thou shouldst celebrate it in its season, one day in the year,
and I explained to thee its sacrifices that the children of Israel should remember and should celebrate it throughout their generations in this month, one day in every year.