(with-eval-after-load 'holidays
  (setopt holiday-local-holidays
          '((holiday-easter-etc +1 "Easter Monday")
            (holiday-easter-etc -2 "Good Friday")
            (holiday-fixed 01 01 "Establishment of the Slovak Republic")
            (holiday-fixed 01 06 "Epiphany")
            (holiday-fixed 05 01 "International Workers' Day")
            (holiday-fixed 05 08 "Victory over fascism")
            (holiday-fixed 07 05 "Saints Cyril and Methodius")
            (holiday-fixed 08 29 "Slovak National Uprising")
            (holiday-fixed 09 01 "Constitution Day, 1992")
            (holiday-fixed 09 15 "Day of Our Lady of the Seven Sorrows")
            (holiday-fixed 11 01 "All Saints' Day")
            (holiday-fixed 11 17 "Struggle for Freedom and Democracy")
            (holiday-fixed 12 24 "Christmas Eve")
            (holiday-fixed 12 25 "Christmas Day")
            (holiday-fixed 12 26 "St. Stephen's Day"))))