There is a 9.7 percent increase in happiness on Fridays compared with the worst day of the week, Monday. That is among the discoveries made by Facebook researchers with access to two years of anonymous “status updates” from 100 million users in the U.S. “It’s early,” said James W. Pennebaker, a psychology professor at The University of Texas at Austin who is one of the people responsible for the Linguistic Inquiry and Word Count dictionary, which Facebook used to assess words for happiness and sadness.
Is it a Day to be Happy? Check the Index
The New York Times