Caitanya-caritāmṛta 1.16
cabbiśa vatsara śeṣe yei māgha-māsa tāra śukla-pakṣe prabhu karilā sannyāsa
[chabbisha vatsara sheshe yei maagha-maasa taara shukla-pakshe prabhu karilaa sannyaasa]
Blended reading (Sanskrit + English inline)
cabbiśa vatsara śeṣe yei māgha-māsa tāra śukla-pakṣe prabhu karilā sannyāsa
At the end of His twenty-fourth year, in the month of Māgha, during the fortnight of the waxing moon, the Lord accepted the renounced order of life, sannyāsa.
My note
Source: vedabase.io