| John ante Portam Latinam (Saint —) |
| John Climacus (Saint —) |
| John the Baptist (Saint —) |
| Joseph (Saint —) |
| Judas (Saint —) |
| Julia (Saint —) |
| Julian of Cuenca (Saint —) |
| Julian of Toledo (Saint —) |
| Julian the Hospitaler (Saint —) |
| July 10th |
| July 21th |
| July 27th |
| July 30th |
| July 9th |
| June 10th |
| June 1st |
| June 21th |
| June 30th |
| June 8th |
| Justus (Saint —) |