https://github.com/Fuco1/slovak-holidays.git
git clone 'git://github.com/Fuco1/slovak-holidays.git'
This package adds slovak holidays to the Emacs calendar.
If you have org-agenda-include-diary set to t, these will be also listed in the org-agenda view.
If you install from MELPA, then you don't have to do anything as the list will automatically autoload and be added to holiday-other-holidays list.
If you install manually, add a call to (slovak-holidays-add) somewhere into your .emacs. Note that this must be called before Emacs calendar is loaded.