Read these scriptures and find out that from them the unbeliever takes this word, "we will not know the day or the hour".
From these very same scriptures however the believer gets this, "watch therefore, be ye ready therefore, if you watch you will not be surprised as by a thief for you will know the hour He comes and the day He comes"
Matthew 24:42 WATCH THEREFORE: for ye know not what hour your Lord doth come.
Matthew 24:44 Therefore BE YE also READY: for in such an hour as ye think not the Son of man cometh.
Matthew 25:13 WATCH THEREFORE, for ye know neither the day nor the hour wherein the Son of man cometh.
Mark 13:35 Watch ye therefore: for ye know not when the master of the house cometh, at even, or at MIDNIGHT, or at the cockcrowing, or in the morning:
Mark 13:37 And what I say unto you I say unto all, WATCH.
Mark 14:37 And He cometh, and findeth them sleeping, and saith unto Peter, Simon, sleepest thou? couldest not thou watch ONE hour?
Mark 14:38 Watch ye and pray, lest ye enter into temptation. The spirit truly is ready, but the flesh is weak.
Luke 12:38 And if He shall come in the second watch, or come in the third watch, and find them so, blessed are those servants.
Luke 21:36 Watch ye therefore, and PRAY ALWAYS, that ye may be accounted WORTHY to ESCAPE ALL these things that shall come to pass, and to stand before the Son of man.
Acts 20:31 Therefore watch, and remember, that by the space of three years I ceased not to warn every one night and day with tears.
1Corinthians 16:13 Watch ye, stand fast in the faith, quit you like men, be strong.
Colossians 4:2 Continue in prayer, and watch in the same with thanksgiving;
1Thessalonians 5:6 Therefore let us not sleep, as do others; but let us watch and be sober.
2Timothy 4:5 But watch thou in all things, endure afflictions, do the work of an evangelist, make full proof of thy ministry.
1Peter 4:7 But the end of all things is at hand: be ye therefore sober, and watch unto prayer.
Revelation 3:3 Remember therefore how thou hast received and heard, and hold fast, and repent. If therefore thou shalt NOT WATCH, I will come on thee AS A THIEF, and thou shalt NOT KNOW WHAT HOUR I will come upon thee.
(Mark 14:38 indicates what divides the two groups and sends the 5 foolish virgins into the hour of temptation which is the hour Yeshua spares the 5 wise virgins from in Revelation 3:10)