I just finished a study on what exactly is the "great tribulation", and when it actually starts, also what the day the second coming of the Messiah will be like, and how the Torah autumn appointed times relate to the events of his second coming, and when the seven trumpets and seven bowls of Revelation actually happen. Check out the study here What the Great Tribulation of the Second Coming Will Be Like, and When the Seven Trumpets and Seven Bowls of Revelation Will Happen | Wisdom of God .