Chapter five, what can you conclude about the nature of time in regards to the broken mantle clock, especially as it relates to Gatsby?

In relation to Gatsby, we can infer that time is standing still. He's been waiting and preparing for this moment for five years.

Gatsby, his hands still in his pockets, was reclining against the mantelpiece in a strained counterfeit of perfect ease, even of boredom. His head leaned back so far that it rested against the face of a defunct mantelpiece clock, and from this position his distraught eyes stared down at Daisy, who was sitting, frightened but graceful, on the edge of a stiff chair.