This link studies the possible prophetic significance of Second Passover (Numbers 9) and its connection to the "days of Noah".... The dates of second Passover are April 26 , 2021 and then next year, May 14, 2022..... This is the only explanation I have seen that ties in the prophetic implication of Numbers 9. Second Passover always precedes Pentecost. Pentecost is May 18, 2021