Chandigarh, April 7: The head of the Akal Takht, the highest temporal seat of Sikhism, Giani Harpreet Singh on Friday appealed to the Sikhs to gather in crowds at Talwandi Sabo, the home to one of the five temporal seats Sri Damdama Sahib, to celebrate 'Khalsa Sajna Diwas' on Baisakhi (April 14).