If it's March, and it's green, it must be St. Patrick's Day. The day honoring the patron saint of Ireland is a global celebration of Irish heritage. And nowhere is that more so than in the United States,

St. Patrick’s Day falls on Monday this year, which means the Irish and Irish at heart get to enjoy a whole weekend of celebrations in addition to the day itself. There are festivals, traditional music and dancing,

St. Patrick's Day commemorates Irish culture, highlighted in San Francisco by a sprawling parade dating back to the 1850s. Zoom in: The holiday falls on Monday this year, which means the party starts this weekend.