1. Washington crossed the Delaware River on December 24, 1776
On December 24, 1776, Washington and his troops crossed the frozen Delaware River in a surprise attack against the Hessian mercenaries encamped at Trenton, New Jersey. The successful attack was a turning point in the American Revolutionary War.

2. The first Christmas tree in the White House was erected on December 24, 1856
In 1856, President Franklin Pierce erected the first Christmas tree in the White House on December 24. The tree was decorated with candles, ornaments, and other decorations.

3. Congress passed the Federal Reserve Act on December 24, 1913
On December 24, 1913, Congress passed the Federal Reserve Act, which created the Federal Reserve System. This centralized banking system is still in place today and has played a significant role in stabilizing the economy over the years.

4. Earthquake strikes Washington on December 24, 1872
On December 24, 1872, an earthquake shook Washington state, causing damage in the Seattle area. The earthquake, which measured 4.8 on the Richter scale, was one of several that occurred in the region in the 19th century.

5. WWII-era submarine discovered off Washington coast on December 24, 2009
On December 24, 2009, a team of researchers discovered the wreck of the WWII-era submarine USS H-1 off the coast of Washington state. The submarine was sunk during a training exercise in 1920 and had been missing since then. The discovery provided valuable insight into the history of the US Navy.