3. What exactly happened in heaven at the close of the 2300 day/year prophecy?

Just as the high priest went from the Holy Place into the Most Holy Place on the ancient Day of Atonement, so at the end of the prophetic period of 2300 days, Jesus entered the second and last phase of His atoning ministry. The Jewish Day of Atonement where God judged His people was a representation of heaven’s judgment event described in Daniel 7. This “pre-Advent investigative” judgment involves examining the heavenly records of all who have believed on Jesus. He also continues to be our Mediator while now serving as our Judge.JTL4 3.1