There must be no time-setting for the rapture.

.............The Lord encouraged His Church not to be discouraged nor to allow their devotion to wane. They were to be ready, whether the Bridegroom should come at morning, noon or midnight.

.....................Mark 13:35-37

"Watch ye therefore: for ye know not when the master of the house cometh, at even, or at midnight, or at the cock-crowing, or in the morning: Lest coming suddenly he find you sleeping. And what I say unto you I say unto all, Watch."