"Handal's son 'Bidhi Chand' was a nefarious person and he corrupted the 'Janam Sakhi' of Guru Nanak by altering many sakhis. Also he is responsible for altering the date of birth of Guru Nanak from 'Katak to Vasakh'."
Shouldnt it be from Vaisakh to Kattak?
Well you chould predict this and make the article correct u have full right, But do give references. Enjoy life.Lucky