"Remarkable years" can be described as exceptional time periods that stand out for their notable achievements, discoveries, challenges, or changes. Synonyms for this phrase may include "memorable era," "noteworthy decade," "impressive epoch," "outstanding time," or "unforgettable span." These phrases convey the idea of an exceptional time period that is significant and memorable in its own right. Whether it was a period of great achievement in science, art, literature, or politics, or a time of great struggle and adversity, these synonyms capture the essence of the impact that time period had on history and culture.