The phrase "most day to day" typically refers to activities and experiences that are commonplace or routine in our daily lives. When seeking antonyms for this phrase, we may look for words that connote rarity, novelty, or exceptionality. Examples of such antonyms might include "rare," "unusual," "extraordinary," "novel," "exceptional," "irregular," or "infrequent." These words describe activities and experiences that break from the norm and stand out as distinct or unique. By considering the antonyms of "most day to day," we can expand our vocabulary and gain a more nuanced understanding of the language we use to describe our lives.