Other than life/death, I think the strongest theme in A Tale for the Time Being is the theme of time or age and how that can be interpreted in a number of different ways. Time plays a huge role, both in terms of the timeline difference between Ruth and Nao, but also how each character handles their time. Nao feels that at the age of 16, she has already wasted all her time. She feels as though she has accomplished nothing in her life, and fantasizes about ending her time on earth. She refers to herself as a Time Being, something Ruth embraces in the end as well. Ruth is lost in what could be described as writer’s block, and has felt as though she has wasted a lot of time not working on her memoir. Reflection and memory is a huge component of time, and the characters in this novel reflect upon the past a lot.
Nao is always thinking about the “happier” times – her life back in Sunnyvale, her old friends, her father’s happiness – and Ruth thinks about her life in New York as well as her mother before she died. Before long, Ruth begins to pour most of her time into this diary, and despite their difference of age, connects with Nao at a most personal level. At one point, Ruth refers to writing as the “opposite of suicide”, meaning that writing is “about immortality. Defeating death or at least forestalling it”. The theme of life and death are very much tied to time and age, and Nao’s diary preserves her 2001 teenage self as if she poured a bit of her soul into it (harry potter reference!), which lends to the idea that writing is a form of “time travel”.