The Saka Sirhind (Punjabi: ਸਾਕਾ ਸਰਹਿੰਦ) or the Nikke Sahibzada Saka (Punjabi: ਨਿੱਕੇ ਸਾਹਿਬਜ਼ਾਦੇ ਸਾਕਾ) refers to the martyrdom (Shaheedi) of the two sons of Guru Gobind Singh, named Zorawar Singh and Fateh Singh. The two Sikh children are remembered as the Nikke Sahibzade (Punjabi: ਨਿੱਕੇ ਸਾਹਿਬਜ਼ਾਦੇ (Gurmukhi)). They are believed to have attained martyrdom on
26 December 1704 at the ages of 5(or 6) and 9 respectively. In remembrance of this occasion, the Shaheedi Jor Mela is organised annually at Fatehgarh Sahib Punjab, India, to commemorate the supreme sacrifice at the place of their martyrdom on the 24th to 26th December.[1]