Why Do We Have Leap Years?Leap years occur every 4 years to keep the Earth’s calendar aligned with the number of revolutions it takes around the sun.

More From CBS Detroit

Best 4th Of July Concerts In Metro DetroitStaying home this weekend? Celebrate the 4th of July by rocking out at one of these shows.
Hump Day Drinks: 8 Cheery Cocktail RecipesNow that you've made it through half the work week, it's time to celebrate!

Watch & Listen