After Pentecost, there was quite a long gap before the final three festivals, all of which took place in quick succession during the seventh month of the Jewish year, at the end of the harvest season. That month opened with the ceremonial blowing of trumpets (Leviticus 23:23,24), to announce God’s imminent arrival (as at Mount Sinai) and to summon His people to prepare to meet Him.
We are now in a period of waiting (and harvesting for the Kingdom), but at the end of this age something very similar will happen. “For the Lord Himself will come down from heaven, with a loud command, with the voice of the archangel and with the trumpet call of God, and the dead in Christ will rise first. After that, we who are still alive and are left will be caught up together with them in the clouds to meet the Lord in the air. And so we will be with the Lord for ever.” (I Thessalonians 4:16,17) Will we be ready?