I am in Toronto canada, I change 100 times my country time, but not correct time

Hi guys I need your help, I got this cameras in my home

[2.8mm] Hikvision DS-2CD2542FWD-IWS 4MP Built-in Mic Wifi indoor Dome Camera

, and I change time 100 times to Toronto Canada tine, it is always going back to ONE HOUR AFTER, so I like to know "How to set Current Eastern Standard Time" permanently,

Waiting for your reply,

Thanks ,