CC Madhya 20.198

dvādaśa-māsera devatā — ei-bāra jana
mārgaśīrṣe — keśava, pauṣe — nārāyaṇa
Word for word: 
dvādaśa-māsera — of the twelve months; devatā — predominating Deities; ei — these; bāra jana — twelve Personalities of Godhead; mārga-śīrṣe — the month of Agrahāyana (November-December); keśava — Keśava; pauṣe — the month of Pauṣa (December-January); nārāyaṇa — Nārāyaṇa.
Translation: 
“These twelve are the predominating Deities of the twelve months. Keśava is the predominating Deity of Agrahāyana, and Nārāyaṇa is the predominating Deity of Pauṣa.