Why the US celebrates Veterans Day and how the holiday has changed over time

President Joe Biden laid a wreath at Arlington National Cemetery on Monday for Veterans Day as thousands marched through the streets of New York. Smaller parades were held across the nation to honor Americans who have served in the U.S. military.

The Veterans Day holiday began more than a century ago, albeit under a different name, as a celebration of the end of World War I. Over time its name and purpose evolved into a day of recognition for U.S. veterans of all wars as well as those currently serving in uniform.

It's also day off for U.S. postal workers and other federal government employees, as well as many schoolchildren. Numerous stores and businesses offer giveaways and discounts.

Here's a look at how the United States celebrates Veterans Day and how it started: