The term "bygone" typically refers to something that is no longer in existence or relevant. Its antonyms can include current, present, contemporary, modern, ongoing, and up-to-date. These words connote a sense of present-day importance and relevance, indicating that something is still relevant or in existence. Conversely, the antonyms to "bygone" also include synonyms for the past, such as archaic, obsolete, outdated, antiquated, and extinct. These words emphasize that something is no longer relevant or in use, suggesting that it has been left behind or replaced by something else. By understanding these antonyms, we can better grasp the significance of the word "bygone" and how it relates to our perceptions of history and the present moment.