Few question are coming in to my mind plz try to answer them
1. Why there is no jaikara @ Darbar sahib after Ardas?
2. Who has desiged KHANDA?
3. Is there any history about prabhat pheri, why we alwayz do prabhat pheri of Guru Nanak Dev ji & guru Gobind singh ji Not of any other?
Reference:: Sikh Philosophy Network http://www.sikhphilosophy.net/history-of-sikhism/7634-questions-jaikara-khanda-sahib-prabhat-pheri.html
thx