Mood and emotion are both feelings that are often interchanged with one another. It is easy to want to interchange them because they are closely related, but there are differences between them. One of those differences is the length of time in which they last. Emotions do not last long, and a person's emotion often changes. A mood will last much longer than emotion, and they are not able to be changed. Emotion can change from a moment, but moods are normally daily and weekly. Another difference between them is the extremity to them. Emotions, such as anger or range, tend to be more extreme than someone's mood of having a bad day.
Mood and emotions are closely related. However, the main difference is that emotions tend to fluctuate, and they do not last for too long, whereas mood is more conducive to being something that lasts for a while, and the mood is not changing. On the other hand, moods are unchanged. Emotions are often generated from a particular situation or event. On the other hand, moods are not fashioned in someone because of any unique situation or even just a bad day.
Moods are also typically, in some way or another, every day. However, it is because it is not a regular occurrence; emotions do not last as long but are more extreme. Mood is something an individual may not express, while emotions may be expressed. Also, when dealing with emotion such as anger, the level of anger directly pertains to the time it is experienced.