Prime Minister Narendra Modi on Monday lit the customary first diya at the Raj Ghat in Varanasi and launched the Dev Deepawali Mahotsav.
The prime minister was accompanied by state Chief Minister Yogi Adiyanath for the ceremony.
Some 15 lakh diyas lit up on the ghats of Ganga to mark the beginning of celebrations on the occasion of Kartik Purnima. Classical dancers performed during the occasion.