"Therefore keep watch, because you do not know on what day your Lord will come."
â Matthew 24:42
Quick Answer
This phrase, from Jesus' own words in Matthew 24:36, means that the exact timing of His return was deliberately hidden even from the angels and, in His incarnate state, from the Son Himself, known only to the Father. It functions as a firm boundary against date-setting and a call to ongoing watchfulness rather than calculation (Matthew 24:42; Acts 1:7).
The Exact Words and Their Setting
The phrase comes from Jesus' Olivet Discourse, immediately after His description of the tribulation, cosmic signs, and His visible return: "But about that day or hour no one knows, not even the angels in heaven, nor the Son, but only the Father" (Matthew 24:36). Mark's parallel account records the same statement almost word for word (Mark 13:32).
Its placement matters. Jesus has just spent considerable time giving real, specific signs, wars, famines, the abomination of desolation, cosmic disturbances, so this is not a claim that nothing can be known about His return. It is a precise, deliberate limitation on one particular kind of knowledge: the exact calendar date.
Why Even the Son Did Not Know
This verse raises a genuine theological question: how can Jesus, who is fully God, not know something? The historic, orthodox answer lies in the doctrine of the incarnation. In taking on true humanity, the eternal Son voluntarily accepted real human limitations in His earthly life and ministry, what theologians call His state of humiliation (Philippians 2:6-8), without ceasing to be fully God.
This does not mean Jesus' divine nature was somehow diminished; it means that, as the incarnate Son ministering on earth, He did not draw on omniscient knowledge for every purpose, and the timing of His own return was one specific matter reserved by the Father's authority. This is consistent with other statements where Jesus submits knowledge and timing to the Father's sovereign plan (Acts 1:7).
Does This Verse Undermine Who Jesus Is?
Some have tried to use Matthew 24:36 to argue that Jesus cannot be fully God, reasoning that an all-knowing God could not be ignorant of anything, including this. It is worth answering that claim directly, because Scripture elsewhere is emphatic about Christ's full deity and knowledge. John records Peter telling Jesus, "Lord, you know all things; you know that I love you" (John 21:17), and Paul writes that "in Christ all the fullness of the Deity lives in bodily form" (Colossians 2:9). These are not the words of a merely limited teacher.
The historic, orthodox resolution lies in recognizing that Jesus is one person with two complete natures, fully God and fully human, united without confusion or division. In His incarnate ministry on earth, the Son voluntarily lived within the limitations proper to genuine humanity, including, in this one specific instance, not accessing the Father's exclusive knowledge of the exact day of His return, while never ceasing to be fully God in His unchanging divine nature (Philippians 2:6-8). Theologians have long distinguished between what Christ knew and revealed in His office as the incarnate Son sent to accomplish a specific mission, and the full, undiminished omniscience that remains eternally true of Him as God. Matthew 24:36 describes the former, a voluntary limitation tied to His earthly mission, not a permanent limitation on the latter.
A Deliberate Boundary, Not an Accident
It is significant that this hiddenness is not framed as an unfortunate gap in information but as something intentional. When the disciples later ask about timing again after the resurrection, Jesus responds, "It is not for you to know the times or dates the Father has set by his own authority" (Acts 1:7), language of deliberate withholding, not incomplete revelation.
This should reshape how believers approach prophecy. Scripture gives real, meaningful information about the character and signs of the end times, but it consistently refuses to give a calendar, and that refusal comes from God's own wisdom about what His people actually need.
The Purpose: Readiness, Not Anxiety or Apathy
Jesus draws out the practical implication immediately: "Therefore keep watch, because you do not know on what day your Lord will come" (Matthew 24:42). If the date were known, human nature being what it is, many would likely delay repentance and faithful living until closer to the deadline. Because the date is unknown, every day carries equal weight and urgency.
This is reinforced through the parables that follow, the faithful servant who is blessed for being found doing his master's will "whenever he comes" (Matthew 24:45-46), and the foolish servant who presumes on a delay and is caught unprepared (Matthew 24:48-51). The unknown timing is meant to produce consistent faithfulness, not sporadic panic followed by long stretches of complacency.
Living Well With What You Do Not Know
Rather than treating "no one knows the day or hour" as a frustrating limitation, it is worth receiving it as good pastoral wisdom from Jesus Himself. Every attempt in church history to override this statement and pin down a date has failed, often causing real harm to sincere believers who were misled. The verse remains a standing warning against that whole enterprise.
Instead, let this truth do what Jesus intended: free you from the exhausting cycle of prophetic speculation and refocus you on the daily, ordinary faithfulness that honors God whether Christ returns today or a hundred years from now, living, as Peter put it, "holy and godly lives as you look forward to the day of God" (2 Peter 3:11-12).
There is real freedom in accepting the limits Jesus placed on this knowledge. You are not responsible for figuring out what the Father alone has reserved for Himself; you are responsible for the ordinary, daily obedience that keeps you ready regardless of when the day finally arrives. That is a far lighter, far more sustainable calling than trying to crack a code no one, not even the angels, was ever given the key to.