Final answer:
Jesus' post-resurrection ministry lasted for 40 days according to the New Testament. During these 40 days, He appeared to His disciples, gave them instructions, and ultimately ascended into heaven.
Step-by-step explanation:
According to the New Testament accounts, Jesus' post-resurrection ministry lasted for 40 days. After his resurrection, Jesus appeared to his disciples and followers multiple times. He provided them with further teachings, commissioned the apostles for the task of spreading his teachings to all nations, and finally ascended into heaven. This significant period culminated with the event of Ascension. The accounts of Jesus' post-resurrection appearances can be found in various passages of the Gospels - specifically, the Books of Matthew, Mark, Luke, and John.
The period of 40 days is specifically mentioned in the Acts of the Apostles (Acts 1:3), where it is stated that Jesus presented himself alive to his disciples after his suffering by many evidences, appearing to them during forty days and speaking about the kingdom of God. The ascension of Jesus is a foundational event in Christian theology, marking the definitive entry of Jesus' humanity into divine glory.