I am currently working for a Swiss Bank that has offices in Krakow, Poland. As part of my daily duties I am required to have telephone conference call with our Polish colleagues (not for any "Idle Polish Chit-Chat" though!) and when we had our call yesterday they happily told me that today is Polish Independence Day and it is a national holiday.
A brief account of the significance and history of this day can be found here - Polish Independence Day
So to any Polish readers dropping by I will say only this - Szczęśliwy Dzień Niepodległości!