Bhagavad Gita 8.24

8.24 Fire, light daytime, the bright fortnight, the six months of the northern path of the sun (the northern solstice) departing then (by these) men who know Brahman go to Brahman.

Those who know the Supreme Brahman attain that Supreme by passing away from the world during the influence of the fiery god, in the light, at an auspicious moment of the day, during the fortnight of the waxing moon, or during the six months when the sun travels in the north.