Happy to suggest. How fun! The timing of the blooming is not a reliable measure for ID because blooming is triggered by day length, which can vary for potted plants inside if lights are on when it is dark outside. Strong street lights can contribute to anomalies in timing. At higher latitudes where tropical wannabes like us live, the day length varies wildly, unlike the tropical regions to which these plants are indigenous, which causes the difficulties in predicting or quantifying plants in regard to the timing of blooms. But does make it ultra-easy for growers to manipulate them to be in bloom at a specific time. The anatomy of the plant tells all.
This species is sold by the millions every year with labels that say Christmas or holiday cactus, and sometimes just "zygocactus." You can call it whichever you like, as a nicknames. Nicknames are neither right nor wrong, just more or less popular per particular plant.
