"Topic of the day" is a phrase that refers to the main subject or theme that is being focused on for a specific day. Though it is a common phrase, there are multiple different synonyms that can be used in its place. Some alternatives include "subject for discussion," "main point of focus," "primary matter," "theme for the day," "central idea," and "issue at hand." These synonyms are interchangeable and can be used to emphasize different aspects of the topic being discussed. Regardless of which synonym is used, the importance of having a clear and concise focus for the day's activities cannot be overstated.