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Beyond Birth and Death
“Those who know the Supreme Brahman pass away from the world during the influence of the fiery god, in the light, at an auspicious moment, during the fortnight of the moon and the six months when the sun travels in the north.” (Bg. 8.24)
The sun spends six months on the northern side of the equator and six months on the southern side. In  Śrīmad-Bhāgavatam  we have information that as the planets are moving, so also the sun is moving. If one dies when the sun is situated in the northern hemisphere, he attains liberation.
dhūmo rātris tathā kṛṣṇaḥ ṣaṇ-māsā dakṣiṇāyanam tatra cāndramasaṁ jyotir yogī prāpya nivartate
śukla-kṛṣṇe gatī hy ete jagataḥ śāśvate mate ekayā yāty anāvṛttim anyayāvartate punaḥ
“The mystic who passes away from this world during the smoke, the night, the moonless fortnight, or in the six months when the sun passes to the south, or who reaches the moon planet, again comes back. According to the  Vedas , there are two ways of passing from this world—one in light and one in darkness. When one passes in light, he does not come back; but when one passes in darkness, he returns.” (Bg. 8.25-26)
This is all by chance. We do not know when we are going to die, and we may die accidentally at any