Known now as a day of patriotism and enjoying time off from work, the Fourth of July began the journey to becoming a quintessential American holiday in 1776, when the Second Continental Congress adopted the Declaration of Independence.

Displays of patriotism were evident at parades and hot dog eating contests, even at a time of deep political divisions among Americans.

The United States will start a yearlong celebration of its 250th birthday. Here's what you need to know about the patriotic celebrations, which started with the Grand Military Parade & Celebration on June 14th.