Is Kartik Purnima the same day as Guru Nanak Jayanti?

Yes — Guru Nanak Jayanti, the birthday of Guru Nanak Dev Ji, falls on Kartik Purnima each year. Guru Nanak was born on the full moon of Kartik in 1469 CE. This means that each year, the Hindu Dev Deepawali celebration and the Sikh Guru Nanak Jayanti fall on the same day, making Kartik Purnima a day of shared sacred significance across two of India’s great spiritual traditions.