What makes you laugh? If you don’t know, March 19 is a great day to figure it out — because it’s National Let’s Laugh Day. This annual holiday is dedicated to the universal human language of laughter ...

A number of studies suggest that laughter is good for your health: It lowers stress, alleviates anxiety and gives you energy to finish a task. It can also reduce inflammation and improve blood flow, ...

Laughter also has social value: it promotes unity, gets at truths, allows us to broach tough subjects. Research has even shown that people who make us laugh are more influential and easier to forgive.