The last verse of Sri Caitanya-caritamrta, as translated by Srila Prabhupada, is:

In Vrndavana in the year 1537 Sakabda Era [A.D. 1615], in the month of Jyaistha [May-June], on Sunday, the fifth day of the waning moon, this Caitanya-caritamrta has been completed.

(Cc Antya 20.157)

The 400th anniversary of this event is on 7 June 2015, as calculated for Vrndavana.

sruyatam sruyatam nityam
giyatam giyatam muda
cintyatam cintyatam bhaktas
caitanya-caritamrtam

O devotees, may the transcendental life and characteristics of Sri Caitanya Mahaprabhu [Caitanya-caritamrta] always be heard, chanted and meditated upon with great happiness.

Cc Antya 12.2