Friday was “World Smile Day”…but you should celebrate it every day because it’s great for you, according to Buzzfeed and  Lifehack!

A few examples:

Smiling is contagious  According to scientific research, neurons in your brain have a synchronizing feature that keeps you in sync with people you’re talking to…so if you smile, they will, too!

Smiling can make you feel better  Science has shown that big, genuine smiles where you squint your eyes can boost your immune system and decrease cortisol in your body.

Smiling can reduce blood pressure  Smiling releases endorphins which can lower your blood pressure AND lift your mood!

Smiling might get you promoted at work  Studies have found that employers tend to promote people who smile more often maybe because it shows your boss you’re engaged and easy to work with.

Oh, and a smiling “Pro Tip”:  Say “cheeks” instead of “cheese” when someone takes your picture…it lifts your cheeks upward which gives you a more flattering and natural smile.