The Hour of Opposition was a time that came once in a Romulan year when Remus catches up with Romulus's orbit and the two worlds reach the point where they are closest where they would be more more than a million kilometers apart.

Traditionally, it was a time of celebration on both worlds though more so on Romulus itself where schools and businesses close while families travel to be together to share meals. Game birds a consumed to instil the spirit of the Imperial raptor which has brought the worl together again, as they were in the beginning. (TOS novel: Captain's Blood)