Question: When did Karl, Duke Of Schleswig-Holstein-Sonderburg-Glücksburg's father die?

Knowledge 1: Karl, Duke of Schleswig-Holstein-Sonderburg-Glücksburg
Karl of Schleswig-Holstein-Sonderburg-Glücksburg (30 September 1813 at Gottorp in Schleswig, Duchy of Schleswig – 24 October 1878 at Luisenlund, Glücksburg, in Schleswig-Holstein, Prussia) was the second Duke of Schleswig-Holstein-Sonderburg-Glücksburg.Karl was the eldest son of Friedrich Wilhelm, Duke of Schleswig-Holstein-Sonderburg-Glücksburg and Princess Louise Caroline of Hesse-Kassel and an elder brother of Christian IX of Denmark.Karl became Duke of Schleswig-Holstein-Sonderburg-Glücksburg upon his father's death on 27 February 1831. [SEP] Knowledge 2: Friedrich Wilhelm, Duke of Schleswig-Holstein-Sonderburg-Glücksburg
Friedrich Wilhelm, Duke of Schleswig-Holstein-Sonderburg-Glücksburg (4 January 1785 – 17 February 1831) inherited the title of Duke of Schleswig-Holstein-Sonderburg-Beck in 1816.He subsequently changed his title to Duke of Schleswig-Holstein-Sonderburg-Glücksburg in 1825 and founded a line that includes the Royal Houses of Denmark, Greece, Norway, and the Commonwealth realms.
Knowledge 1: Karl, Duke of Schleswig-Holstein-Sonderburg-Glücksburg
Karl of Schleswig-Holstein-Sonderburg-Glücksburg (30 September 1813 at Gottorp in Schleswig, Duchy of Schleswig – 24 October 1878 at Luisenlund, Glücksburg, in Schleswig-Holstein, Prussia) was the second Duke of Schleswig-Holstein-Sonderburg-Glücksburg.Karl was the eldest son of Friedrich Wilhelm, Duke of Schleswig-Holstein-Sonderburg-Glücksburg and Princess Louise Caroline of Hesse-Kassel and an elder brother of Christian IX of Denmark.Karl became Duke of Schleswig-Holstein-Sonderburg-Glücksburg upon his father's death on 27 February 1831. [SEP] Knowledge 2: Friedrich, Duke of Schleswig-Holstein-Sonderburg-Glücksburg
Friedrich of Schleswig- Holstein- Sonderburg- Glücksburg( 23 October 1814 in Schleswig, Duchy of Schleswig – 27 November 1885 in Luisenlund, Schleswig- Holstein, Prussia) was the third Duke of Schleswig- Holstein- Sonderburg- Glücksburg.Friedrich was the second- eldest son of Friedrich Wilhelm, Duke of Schleswig- Holstein- Sonderburg- Glücksburg and Princess Louise Caroline of Hesse- Kassel and an elder brother of Christian IX of Denmark.Friedrich inherited the title of Duke of Schleswig- Holstein- Sonderburg- Glücksburg upon his childless brother Karl's death on 14 October 1878.
Knowledge 1: Karl, Duke of Schleswig-Holstein-Sonderburg-Glücksburg
Karl of Schleswig-Holstein-Sonderburg-Glücksburg (30 September 1813 at Gottorp in Schleswig, Duchy of Schleswig – 24 October 1878 at Luisenlund, Glücksburg, in Schleswig-Holstein, Prussia) was the second Duke of Schleswig-Holstein-Sonderburg-Glücksburg.Karl was the eldest son of Friedrich Wilhelm, Duke of Schleswig-Holstein-Sonderburg-Glücksburg and Princess Louise Caroline of Hesse-Kassel and an elder brother of Christian IX of Denmark.Karl became Duke of Schleswig-Holstein-Sonderburg-Glücksburg upon his father's death on 27 February 1831. [SEP] Knowledge 2: Princess Karoline Mathilde of Schleswig-Holstein-Sonderburg-Glücksburg
Princess Karoline Mathilde of Schleswig- Holstein- Sonderburg- Glücksburg( Viktoria- Irene Adelheid Auguste Alberta Feodora Karoline Mathilde of Schleswig -Holstein- Sonderburg- Glücksburg; 11 May 1894 – 28 January 1972) was a member of the House of Schleswig- Holstein- Sonderburg- Glücksburg and Princess of Schleswig- Holstein- Sonderburg- Glücksburg by birth and a member of the House of Solms Baruth and Countess of Solms Baruth through her marriage to Count Hans of Solms- Baruth.

Answer: 17 February 1831