happy gurpurab, guru nanak jayanti festival of sikh celebration background

akhand path amrit vela guru granth sahib nanak jayanti gurpurab kartik poornima prabhat pheris prakash utsav belief birthday celebration dev founder gurpurb gurdwara gurmukhi india man legend happy november nagarkirtan editable purnima religious saint sikhism sikh shahmukhi tradition religion indian turban vector punjabi illustration blessing culture warrior ceremony spiritual holiday punjab worship