1. 1992
   1960
2. 1880
   1912

"Green Eggs and Ham" was published in 1960 and fans of Dr. Seuss went wild. The book, which features Sam-I-Am offering green eggs and ham "with a mouse" (among other options), is one of Seuss's most beloved works.

1. 1936
   1966
2. 1956
   1946

Elvis' self-titled first album was released in March 1956 and promptly spent 10 weeks atop Billboard's Top Pop Albums. It earned platinum status in August 2011, awarded by the Recording Industry Association of America.

1. 2002
   2004
2. 2008
   1996

Facebook was launched in February of 2004 ... and the rest, as they say, is history. Mark Zuckerberg is credited with the social platform, which was named after a directory of student photos handed out at Harvard.

1. 1812
   1820
2. 1944
   1976

The War of 1812 began, of course, in 1812, but it didn't conclude for three years — in 1815. The conflict was between the United States and Great Britain, over things like trade restrictions and land acquisition.

1. 1884
   1816
2. 1932
   1982

Leaving from Newfoundland, Canada, Earhart navigated a 15-hour, 2,026-mile flight, landing her Lockheed Vega on the coast of Ireland. Not only was it the first solo flight across the Atlantic from a female pilot, but it was also the longest nonstop flight by a woman.

1. 1808
   1872
2. 1912
   1992

The Girl Scouts started in March 1912 under the direction of Juliette "Daisy" Gordon Low. The first meeting included 18 girls in a Savannah, Georgia, troop. We're forever grateful for that first meeting ... and Thin Mints!

1. 1932
   1968
2. 1804
   1892

A 15-year-old was the first official immigrant to pass through Ellis Island Immigration Station, which operated for more than 60 years. Ellis Island lies in the shadow of the Statue of Liberty, a compelling first impression of a new life.

1. 1928
   1916
2. 1952
   1852

Mr. Potato Head, a collection of eyes, ears and noses, was first sold to the public in May 1952. Its creator, George Lerner, was looking for a way to make vegetables more appealing to kids.

1. 1824
   1964
2. 1994
   1844

Thank the leap year 1964 for the breakfast treat loved by millions. Pop-Tarts, Kellogg's most popular brand, were conceived of thanks to a shelf-stable moist dog food that didn't need refrigeration. (True story.) Think of that next time you're chowing down on your Brown Sugar Cinnamon.

1. 1892
   1804
2. 1904
   1952

The year was 1804 and nobody was there to upload it to YouTube, but it happened nonetheless. Alexander Hamilton and Aaron Burr met face-to-face in the dueling pistols event in Weehawken, New Jersey.

1. 1996
   1936
2. 1976
   1952

Apple Computer was founded in 1976 in a garage in Cupertino, California. And, though Steve Jobs is frequently credited with its creation, there were actually two additional co-founders: Steve Wozniak and Ronald Wayne.

1. 1860
   1828
2. 1924
   1940

The Lincoln Memorial is what stands today to remind us of the contributions of America's 16th president, Abraham Lincoln. Lincoln served five years before he was assassinated at Ford's Theatre in 1965 — not a Leap Year, in case you were wondering.

1. 1920
   1962
2. 1888
   1990

Nelson Mandela was imprisoned from 1962 to 1990 for his anti-apartheid work in South Africa. He grew more popular even in prison and was eventually elected as his country's first black president.

1. 2010
   2002
2. 2008
   2012

Barack Obama beat John McCain for the office of the president of the United States in November 2008. He was the country's first black president and renowned for his oratory skills.

1. 1996
   1944
2. 1930
   1888

The Normandy invasion in 1944, known colloquially as D-Day, changed the course of World War II forever. More than 156,000 troops from the United States, Canada and Great Britain stormed the beaches on Normandy in the largest sea invasion in history.

1. 2010
   2018
2. 2016
   2012

This one didn't happen all that long ago, so if you keep up with politics at all, you know that this year is an election year and Trump has been in office since leap year 2016. Trump beat Democratic contender Hillary Clinton for the office.

1. 1916
   1888
2. 2000
   1968

Created in 1916, the National Parks Service manages places like Yellowstone National Park and Mount Rushmore National Memorial. The legislation that was approved by lawmakers placed the NPS inside the Department of the Interior.

1. 1812
   1904
2. 1984
   2004

While it wasn't the world's first New Year's Eve, it WAS the first New Year's Eve party to go down in Times Square, way back in 1904. It would be another four years before the first "ball" would be dropped, however.

1. 1896
   1948
2. 1812
   1924

The Games of the I Olympiad, held in 1896, gave us the first international sporting event we know today as the Summer Olympics. The first took place in Athens, Greece. Tokyo will host the XXXII Olympic Summer Games in 2020.

1. 2000
   1980
2. 1988
   1992

The U.S. hockey team defeated the Russians in a game dubbed the "Miracle on Ice" in February 1980. The game was particularly stunning because it pitted a bunch of collegiate players against international professionals.

1. 1908
   1988
2. 2002
   1840

Considered one of the world's most deadly air show disasters, the 1988 Ramstein air show disaster in Germany had an audience of 300,000. A mid-air collision that fell to the runway contributed to the 70 deaths and more than 300 people injured.

1. 1992
   1982
2. 1972
   1962

Franco Harris, a running back for the Pittsburgh Steelers, hauled in the catch known as the "Immaculate Reception" off a deflection, carrying it into the end zone for a touchdown. The sports moment happened two days before Christmas in 1972.

1. 1984
   1992
2. 1908
   1868

The year was 1984 and Geraldine Ferraro found herself on the Democratic ticket with Walter Mondale, going against the Republican incumbent Ronald Reagan. Of course, Reagan ended up winning, but it was a major victory for women everywhere.

1. 1982
   1948
2. 2000
   1836

The USS Cole bombing happened in October 2000 as the destroyer was sitting in the port of Aden in Yemen. The suicide attack claimed the lives of 17 American sailors and caused injuries to more than three dozen others.

1. 1968
   1880
2. 1908
   2000

Eunice Kennedy Shriver, a sister of the late President John F. Kennedy, is credited with launching the modern-day Special Olympics we've come to know and love. Special Olympics supports activities for people with intellectual and physical disabilities.

1. 1996
   1992
2. 1982
   1988

The Centennial Olympic Park bombing took place in 1996 during the Summer Olympics hosted in Atlanta. A presumed culprit was initially fingered, but authorities later discovered the actual culprit was another man entirely (and that's the premise of the film, "Richard Jewell.")

1. 1920
   1820
2. 1864
   1956

The Nazi Party was birthed in 1920, but wouldn't rise to power for several more years. The party came to be as a result of a paramilitary culture that sought to move people away from communism to nationalism.

1. 1992
   1956
2. 1968
   2002

The original mall, which opened its doors in 1992, covered nearly 80 acres at the site of the Minnesota Vikings' former home field, Metropolitan Stadium. Today, the mall is home to more than 500 stores and 60 restaurants.

1. 2012
   2000
2. 2008
   1996

It seems like yesterday, but it's been almost eight years since the tragic shooting at the movie theater in Aurora, Colorado. The shooter, whom we won't name, entered through an emergency exit to commit his senseless act of violence.

1. 1988
   1914
2. 1852
   1940

The largest of the Nazi-built concentration camps, Auschwitz-Birkenau, was opened in 1940 in south Poland. In the five years it was in operation, it is estimated that more than one million people perished on its grounds.

1. 1844
   1944
2. 2004
   1890

Samuel Morse is credited with the first telegraphic message to be dispatched, a Bible verse that made its way from Washington, D.C., to Baltimore, Maryland. Morse is also known as the person who invented the telegraph machine.

1. 1934
   1928
2. 1984
   1884

"The Adventures of Huckleberry Finn" was published in 1884, several years after we first met Huck Finn in "The Adventures of Tom Sawyer." Mark Twain is widely considered one of America's greatest novelists.

1. 1800
   1972
2. 1876
   1844

It was late June 1876 when Colonel George Custer fought — and lost — at the Battle of Little Bighorn. Nearly 270 U.S. soldiers were killed in the confrontation with members of the Lakota, Northern Cheyenne and Arapaho tribes.

1. 1882
   1928
2. 1948
   1988

The discovery of penicillin by Alexander Fleming in September 1928 would have a profound impact on the health and well-being of people for the next nearly 100 years. The antibiotic has been used to treat a multitude of illnesses and infections.

1. 1940
   1956
2. 1962
   1968

Martin Luther King Jr. died after he was shot outside his motel in Memphis, Tennessee, on April 4, 1968. James Earl Ray was convicted in King's death. Many believe he had been planning the shooting for months.