Callistover
| Callistover | |
|---|---|
 A Day of Happening, which is a Callistover where Callisto encounters Sapphire. | |
| Official name | Callistover, A Day of Happening (only certain Callistovers) |
| Observed by | Callistostarians, members of Sapphire |
| Significance | Celebrates the arrival of Callisto. |
| Celebrations | The arrival of Callisto (on a normal Callistover), Q&A with Callisto (only on a Day of Happening) |
| Date | 20 April |
| Frequency | Annual |