I want to know the answer to the following question:
Under whose rule were new Christian festivals added to previous Roman holidays?
All the background I'm provided with is that "In his Fasti, a long-form poem covering Roman holidays from January to June, Ovid presents a unique look at Roman antiquarian lore, popular customs, and religious practice that is by turns imaginative, entertaining, high-minded, and scurrilous; not a priestly account, despite the speaker's pose as a vates or inspired poet-prophet, but a work of description, imagination and poetic etymology that reflects the broad humor and burlesque spirit of such venerable festivals as the Saturnalia, Consualia, and feast of Anna Perenna on the Ides of March, where Ovid treats the assassination of the newly deified Julius Caesar as utterly incidental to the festivities among the Roman people.". Is that enough to answer the question?
Answer: no