Delays in the start of the Golden Age.

“… however, even once the Omniversal Energy had been released, there was a last-ditch effort by the Dark to stop it from reaching Earth. The timeline on Earth was distorted, bringing this time lag about, so that you are in fact not in linear time where you were supposed to have been. Earth's timeline has been rifted, somehow taken out of its proper place and distorted. These Beings are very clever.

Elora: If the timeline hadn't been moved, when would the Omniversal Energy have reached Earth?

Heru: It looks like around 1976. [Elora: That's a long delay.] Yes, and much damage has been generated due to that delay.

[Elora:] Light Workers who were awakened during the 70's will remember the tremendous sense of anticipation that was felt during that decade, and the feeling that the great shift on Earth was imminent. We know now that these intimations were based on the fact that the Omniversal Energy should have arrived on our Planet around 1976. It is tragic that the Dark was able to move Earth out of its timeline and therefore delay the coming of this great event. From this point, however, we can look forward in the knowledge that no more delays can or will occur. “

source: The Return of Light