Generally, cats have short memories. When separated from their owners and placed in a new environment, they will start to forget their owners within a month. However, if you have spent a long time with your cat, it may take several years for it to forget you.
There is also evidence that some cats have long-term memories that can last up to two years. A cat in Japan remembered its owner even after being separated from them for two years, which shows that if a cat truly has an emotional connection with its owner, it will recognize you even after several years when you meet again.
