On krishna paksha ashtami, in shravana masa, when the Rohini constellation appeared, Devaki gave birth Krishna.

On seeing little Krishna, Vasudeva said:

विदितोऽसि भवान् साक्षात्पुरुष: प्रकृते: पर: ।

vidito ’si bhavān sākṣāt
I am in your presence directly

puruṣaḥ prakṛteḥ paraḥ
Manifestation of the supreme reality

केवलानुभवानन्दस्वरूप: सर्वबुद्धिद‍ृक् ॥

kevalānubhavānanda-
svarūpaḥ sarva-buddhi-dṛk
Experiencing only pure Ananda in the embodiment of total knowledge

- Srimad Bhagavatam 10.3.30