Revelation 3:3 (NIV) "Remember, therefore, what you have received and heard; obey it, and repent. But if you do not wake up, I will come like a thief, and you will not know at what time I will come to you."
1 Thessalonians 5:2-4 (NIV) for you know very well that the day of the Lord will come like a thief in the night. 3 While people are saying, "Peace and safety," destruction will come on them suddenly, as labor pains on a pregnant woman, and they will not escape.
Where do these "Christian" groups keep getting these dates from.