Memory for unique personal events: Effects of pleasantness

College students recorded unique personal events for a 3-month period. At the time of recording, they rated the pleasantness or unpleasantness of the event. Subsequent memory ratings showed no effect of type of affect (i.e., pleasant vs. unpleasant events) but a strong influence of intensity of affect. In contrast, the data for estimating the date of occurrence of events showed an effect of type of affect, with pleasant events estimated more accurately than unpleasant events. A detailed analysis of the data indicated that the effect could not be attributed to the predictability of pleasant events. A red-letter day effect was proposed as an explanation for the estimation data.