The age of Kali began just after the battle of Kuruksetra, but its effects were been checked due to the presence of Krsna. As soon as Krsna left, the effects of the age of Kali manifested.
Srimad Bhagavatam #10: Pariksit meets Kali
The age of Kali began just after the battle of Kuruksetra, but its effects were been checked due to the presence of Krsna. As soon as Krsna left, the effects of the age of Kali manifested.