kṛṣṇa-janma-yātrā - observance of the birth of Lord Kṛṣṇa; dine - on the day of; nanda-mahotsava - the festival observed by Nanda Mahārāja, the father of Kṛṣṇa; gopa-veśa hailā - dressed Himself as a cowherd boy; prabhu - Śrī Caitanya Mahāprabhu; lañā - taking; bhakta saba - all the devotees.

The devotees celebrated the festival of Janmāṣṭamī, Kṛṣṇa’s birthday, which is also called Nanda-mahotsava, the festival of Nanda Mahārāja. At that time Śrī Caitanya Mahāprabhu and His devotees dressed themselves as cowherd boys.