Answer:
The date in which you attained it.
Explanation:
Oral citation adds to the credibility of the author or else it could be considered as a kind of plagiarism. The four major elements of an oral citation include the title of the source and name of the author followed by the date of publication and title of the publication as this would help the readers examine the reliability of your source. Thus, the most irrelevant among these could be the date you attained it as it has no affiliation either to the context of the work or to the readers.
