# SB 5.21.4 > यदा मेषतुलयोर्वर्तते तदाहोरात्राणि समानानि भवन्ति यदा वृषभादिषु पञ्चसु च राशिषुचरति तदाहान्येव वर्धन्ते ह्रसति च मासि मास्येकैका घटिका रात्रिषु ॥४॥ ## Text > yadā meṣa-tulayor vartate tadāho-rātrāṇi samānāni bhavanti yadā vṛṣabhādiṣu pañcasu ca rāśiṣu carati tadāhāny eva vardhante hrasati ca māsi māsy ekaikā ghaṭikā rātriṣu. ## Synonyms *yadā*—when; *meṣa-tulayoḥ*—in Meṣa (Aries) and Tulā (Libra); *vartate*—the sun exists; *tadā*—at that time; *ahaḥ-rātrāṇi*—the days and nights; *samānāni*—equal in duration; *bhavanti*—are; *yadā*—when; *vṛṣabha-ādiṣu*—headed by Vṛṣabha (Taurus) and Mithuna (Gemini); *pañcasu*—in the five; *ca*—also; *rāśiṣu*—signs; *carati*—moves; *tadā*—at that time; *ahāni*—the days; *eva*—certainly; *vardhante*—increase; *hrasati*—is diminished; *ca*—and; *māsi māsi*—in every month; *eka-ekā*—one; *ghaṭikā*—half hour; *rātriṣu*—in the nights. ## Translation **When the sun passes through Meṣa [Aries] and Tulā [Libra], the durations of day and night are equal. When it passes through the five signs headed by Vṛṣabha [Taurus], the duration of the days increases [until Cancer], and then it gradually decreases by half an hour each month, until day and night again become equal [in Libra].**