<human>: The reason I ask this is because my dad passed away 3 years ago. To everyone it was an unexpected death, but it became very apparent after his death that he had known all along. He made sure that everything was in order so that my mom and I would be okay after he was gone.

A couple months before his death he began reaching out to people more than he normally did and telling him how much he loved them. The Christmas before he died he told me that all he wanted for a present was to go out to dinner with me. He wanted nothing material. My relatives had similar stories. 

We had known all along that he had heart disease and had several operations to fix blockage issues. In particular, he had an operation about 2 months before he died. He told all of us that the operation was successful, but we found out later from doctors and reports that he knew very well that ithe operation wasn't successful. He knew that his time was limited.

We all assume that he didn't tell us because he didn't want us to worry. He wanted to enjoy his last moments with us in high spirits and didn't want to cause us any stress.

Could you distill the essence of the text into 1-3 sentences?
<bot>: My dad knew he was dying, but kept it a secret from us. If you knew you were dying would you tell anyone?