From the time Jesus rose from the dead, until he ascended to Heaven, there were 40 very important days.
Life Of Christ, Jesus' Resurrection, The Ascension
This message shows how the resurrection of Jesus was the first stage of exalting Him to the highest place. It was followed by the tenth appearance in the Gospels when Jesus ascended in front of his followers.
Ascension, Easter Appearances, The Ascension, Jesus' Kingship