Resurrection changed not only redemptive history for all time and eternity but it changed all of history. The resurrection of Jesus radically imploded a blood sacrifice economy that was made instantaneously irrelevant the moment Jesus walked out of the grave unassisted.
Without the resurrection we have no gospel, no good news. Without the gospel we have no salvation, without salvation we would be hopelessly lost! The resurrection is the single most important moment, ever. The most important moment was about the most important person, Jesus Christ!