Map of the Day: Moody Blues ... and Reds

Californians are carefree; New Yorkers are bitter; Southerners are cheerful; and West Virginians are angry, right? Those old stereotypes might actually have some truth, according to a new study that analyzed over three million tweets nationwide.

Harvard and Northeastern universities examined the words in people's tweets over three years and assigned "word ratings," as identified by the Center for Research of Psychophysiology. From that, they determined moods by time and location.

They found people are happier in the evenings and on the weekends nationwide, but mood did vary drastically by state. Generally speaking, people in the South and on the West Coast were happier than those in the Midwest and Northeast.

There was no red state-blue state or urban-rural divide. Californians were among the happiest while New Yorkers were the angriest. Floridians were often in good moods while Montanans were often upset.

One trend that was constant: Friday evenings were among the happiest, so we should all be in great moods in a couple of hours.