Today is, in the United States, a federal holiday. Historically, it started as a day to remember the birthday of George Washington, our first president. In the last few decades, however, it has come to be known as President's Day in many states, and is a day to celebrate both Washington and Lincoln's birthdays.
If you are enjoying a holiday today, I hope it is a good one for you. (For the rest of us, we'll just keep working!)