Arvinder Singh, Amandeep Singh, Amanpreet Singh, Harvinder Singh, and Parm Singh. “Building an Open-Source Nanakshahi Calendar: Identity and a Spiritual and Computational Journey”. Sikh Research Journal 5, no. 2 (October 21, 2020): 40–50. Accessed April 1, 2026. https://sikhresearchjournal.org/index.php/srj/article/view/104.