Year dot is a commonly used phrase that refers to ancient or historical times. It can sometimes be challenging to find the perfect replacement for this type of expression. However, some synonyms that can be used instead of year dot include "prehistoric times," "time immemorial," "since the beginning of time," or "antiquity." Other options include "ancient history," "time out of mind," and "remote past." These phrases can be used in place of year dot to describe something that happened a long time ago or to highlight events that occurred in the distant past. While year dot remains a useful expression, these synonyms can add a touch of variation and richness, especially in writing.