Śrīmad-Bhāgavatam · Text 3.11.20
Who is speaking and story frame
सन्ध्यासन्ध्यांशयोरन्तर्य: काल: शतसंख्ययो: ।
तमेवाहुर्युगं तज्ज्ञा यत्र धर्मो विधीयते ॥ २० ॥
sandhyā-sandhyāṁśayor antar
yaḥ kālaḥ śata-saṅkhyayoḥ
tam evāhur yugaṁ taj-jñā
yatra dharmo vidhīyate
The transitional periods before and after every millennium, which are a few hundred years as aforementioned, are known as yuga-sandhyās, or the conjunctions of two millenniums, according to the expert astronomers. In those periods all kinds of religious activities are performed.
Read this verse on Vedabase.ioThis verse has no purport; its meaning is explained by the verses around it.