Srimad Bhagavatam — Panchama Skandha, Shloka 4
The Orbit of the Sun, the Measure of Day and Night, and the Sun-God’s Chariot
यदा मेषतुलयोर्वर्तते तदाहोरात्राणि समानानि भवन्ति यदा वृषभादिषु पञ्चसु च राशिषु चरति तदाहान्येव वर्धन्ते ह्रसति च मासि मास्येकैका घटिका रात्रिषु ॥ ४ ॥
yadā meṣa-tulayor vartate tadāho-rātrāṇi samānāni bhavanti yadā vṛṣabhādiṣu pañcasu ca rāśiṣu carati tadāhāny eva vardhante hrasati ca māsi māsy ekaikā ghaṭikā rātriṣu.
太陽がメーシャ（牡羊宮）とトゥラー（天秤宮）にあるとき、昼夜は等しい。ヴリシャバ（牡牛宮）に始まる五つの宮を巡るとき、昼は次第に長くなり、夜は月ごとに一ガティカー（半時間）ずつ短くなる。やがて再びトゥラーに至り、昼夜は等しくなる。
FAQs
This verse states that when the Sun is in Aries and Libra, day and night become equal in duration.
In Canto 5, Śukadeva explains the structure and functioning of the universe, showing how time, seasons, and cosmic order operate under the Lord’s arrangement.
It encourages seeing time and seasonal rhythms as part of a higher cosmic order, supporting disciplined living (routine, balance) and remembrance that all time ultimately moves under divine governance.