He kept the part about the father not keeping a calendar for years, because it was a short statement that conveyed a big message about the timelessness and loss of civilization and infrastructure of his post-apocalyptic world. The Road has the same line from The Grail about the father and son heading south in order to survive. I believe McCarthy wanted to use this line to highlight the sense of urgency felt by the father to keep his son safe and to present the reader with the story of the father and son's journey. The changes that McCarthy made from The Grail to The Road resulted in a more character focused introduction of his story. McCarthy used less description of the world around the father and son and included more text about the father's actions and thoughts. McCarthy used these changes to help express his main idea about the importance of the child to the father and to set up the story of their journey
He kept the part about the father not keeping a calendar for years, because it was a short statement that conveyed a big message about the timelessness and loss of civilization and infrastructure of his post-apocalyptic world. The Road has the same line from The Grail about the father and son heading south in order to survive. I believe McCarthy wanted to use this line to highlight the sense of urgency felt by the father to keep his son safe and to present the reader with the story of the father and son's journey. The changes that McCarthy made from The Grail to The Road resulted in a more character focused introduction of his story. McCarthy used less description of the world around the father and son and included more text about the father's actions and thoughts. McCarthy used these changes to help express his main idea about the importance of the child to the father and to set up the story of their journey