National Dollar Day

According to The Ultimate Holiday Site today is National Dollar Day.  Why is August 8th, National Dollar Day?  According to the website, on August 8, 1786 Continental Congress, "established the United States monetary system."  I found some Wonders of the Day at Wonderopolis that go with National Dollar Day:

• #158 How Is a $1 Bill Made?
• #142 Did George Washington Have Wooden Teeth?
• #429 How Tall Is the Washington Monument?
• #505 Who's on Mount Rushmore?

These Wonders would also be great for President's Day or for a study on George Washington.