This information, that is the knowledge about one's day of death, will be creating different reactions in different persons. Some will try to enjoy the remaining life, while others will pull out of the main stream. Only a very few will try to plan the remaining days in a useful way. Some may try to complete the unfinished works.
In this context, I may bring to your attention one of my experience. My father knew astrology and used to experiment with it. Several people approached him for consultations. He never did this job for any returns and denied anything that are offered. In a few cases the person approached requested him to give the day or period of death. He generally would not tell the same. But certain persons, because of closeness insisted for the death time. In a couple of cases he personally told them. Without father's knowledge these people started to get ready for the final day. They were not much worried to accept the death.
My father himself did calculations about his own d- day. But never spoke out. But when we look back he was getting ready to go after completing his duties. The marriage of his youngest son was done in a hurry. He visited all his relatives. Certain construction works were done in hurry. The road to our compound was not motorable. He insisted the completion of the work soon, saying that some vehicles would have to come soon. He had said that he would die lying on his bed itself. Just before his death he climbed upstairs and lay on his bed. Within less than half an hour he had a stroke and left us forever.