The Moment is "Now" recognized.

Now is eternal. Now contains everything that exists. Now is constantly changing. The "moment" is recognized by the observer. It is limited by the inertial frame of the observer and it bears witness to the evidence presented.

The moment can only be made sense of in context to the memory of the observer and their experience of the "Now" they exist in. The moment remembered gives the illusion of time its meaning.

Synchronicity of Now proves its unrepeatability.