Singh Purewal, Pal. "Birth Date of Guru Nanak Sahib"(PDF). Purewal's Page. Pal Singh Purewal. Archived(PDF) from the original on 22 February 2015. Retrieved 16 June 2017.
"Movable Holidays". nanakshahi.net. Set year to 2020, and click "Get Dates". Archived from the original on 30 August 2019. Retrieved 22 November 2018.
"Movable Holidays". nanakshahi.net. Set year to 2021, and click "Get Dates". Archived from the original on 30 August 2019. Retrieved 22 November 2018.
Singh Purewal, Pal. "Birth Date of Guru Nanak Sahib"(PDF). Purewal's Page. Pal Singh Purewal. Archived(PDF) from the original on 22 February 2015. Retrieved 16 June 2017.