MEMORABLE TIME can be broken down into three crossword solutions: ERA (3 letters), AGE (3 letters), and EPOCH (5 letters). An ERA is a period of time marked by certain characteristics or events. It is usually used to refer to a long period of time, such as the Middle Ages or the Renaissance. An AGE is a period of time in history that is characterized by certain events or developments. An EPOCH is a period of time marked by a distinctive set of characteristics or events. It is usually used to refer to a longer period of time than an ERA or an AGE.