Supper to have been on Wednesday, 1 April AD 33 and the crucifixion on Friday 3 April AD 33 and the Resurrection on the third day. Context and overview The Christian gospels do not claim to provide an exhaustive list of the events in the life of Jesus. They were written as theological documents in the context of early Christianity rather than historical chronicles, and their authors showed little interest in an absolute chronology of Jesus or in synchronizing the episodes of his life with the secular history of the age. One indication that the gospels are theological documents rather than historical chronicles is that they devote about one-third of their text to just seven days, namely the last week of the life of Jesus in Jerusalem, also known as the Passion of Christ. Nevertheless, the gospels provide some details regarding events which can be clearly dated, so one can establish date ranges regarding major events in Jesus' life by comparison with independent sources. A number of historical non-Christian documents, such as Jewish and Greco-Roman sources, have been used in historical analyses of the chronology of Jesus. Almost all modern historians agree that Jesus existed, and regard his baptism and his crucifixion as historical events, and assume that approximate ranges for these events can be estimated. Using these methods, most scholars assume a date of birth between 6 and 4 BC, and that Jesus' preaching began around AD 27–29 and lasted one to three years. They calculate the death of Jesus as having taken place between AD 30 and 36. Year of Jesus' birth The date of birth of Jesus of Nazareth is not stated in the gospels or in any secular text, but most scholars assume a date of birth between 6 BC and 4 BC. Two main methods have been used to estimate the year of the birth of Jesus: one based on the accounts of his birth in the gospels with reference to King Herod's reign, and another based on subtracting his stated age of "about 30 years" from the time when he began preaching (Luke 3:23) in "the fifteenth year of the reign of Tiberius Caesar" (Luke 3:1–2). The two methods indicate a date of birth before Herod's death in 4 BC, and a date of birth around 2 BC, respectively. Biblical references to King Herod's reign The two nativity accounts of Jesus in the Gospel