Memorable Times can be described in three different ways: EPOCHS (6 letters), ERAS (4 letters) and Letterdays (10 letters). An epoch is a period of time in history or a person's life, marked by notable events or characteristics. An era is a long and distinct period of history with a particular set of characteristics. A letterday is a day of the week that is associated with a particular letter of the alphabet. All three terms can be used to describe memorable times in one's life.