The question of whether the universe is eternal is a topic of ongoing scientific and philosophical inquiry. Our current scientific understanding suggests that the universe had a beginning, known as the Big Bang, approximately 13.8 billion years ago. However, it is challenging to determine with certainty what happened before the Big Bang or if there were any previous universes.
As for a final judgment day, the concept is primarily associated with religious beliefs, particularly in Abrahamic traditions such as Christianity and Islam. According to these beliefs, there is a belief in an ultimate reckoning or judgment when all individuals will be held accountable for their actions, and there will be a final determination of their fate.
It's important to note that discussions of the universe's eternity and the concept of a final judgment day fall into the realms of science, philosophy, and religious beliefs. Different perspectives and interpretations exist, and people hold diverse views based on their cultural, religious, and personal beliefs. It's a subject of speculation, debate, and personal faith rather than definitive scientific knowledge.