http://www.timeanddate.com/calendar/?year=2016&country=14
http://www.timeanddate.com/holidays/poland/
http://www.flipsnack.com/karolina22/prezentacja1.html
NATIONAL HOLIDAYS IN POLAND
FREE TIME
https://drive.google.com/file/d/0BwyUHOSJDLL8NTFKZk5BZjhhMk0/view