Tomorrow is a temporal construct of the relative

future The future is the time after the past and present. Its arrival is considered inevitable due to the existence of time and the laws of physics. Due to the apparent nature of reality and the unavoidability of the future, everything that currently ...

; literally of the

day A day is the time period of a full rotation of the Earth with respect to the Sun. On average, this is 24 hours, 1440 minutes, or 86,400 seconds. In everyday life, the word "day" often refers to a solar day, which is the length between two so ...

after the current day (

today Today (archaically to-day) may refer to: * Day of the present, the time that is perceived directly, often called ''now'' * Current era, present * The current calendar date Arts, entertainment, and media Films * ''Today'' (1930 film), a 1930 A ...

), or figuratively of future periods or times. Tomorrow is usually considered just beyond the

present The present (or here'' and ''now) is the time that is associated with the events perception, perceived directly and in the first time, not as a recollection (perceived more than once) or a speculation (predicted, hypothesis, uncertain). It is ...

and counter to yesterday. It is important in

time perception The study of time perception or chronoception is a field within psychology, cognitive linguistics and neuroscience that refers to the subjective experience, or sense, of time, which is measured by someone's own perception of the duration of the ind ...

because it is the first direction the arrow of time takes humans on Earth.

Philosophy

The use of terms such as tomorrow, now and future are part an a-series view which is part of the presentism philosophy of time.

Learning and language

For a young child, "tomorrow" is "an undefined, infinite time of the idea that time is just an infinite and arbitrary definition of an yet unidentified of what we like to call time, yet the child slowly learns the meaning of tomorrow." The concept of "tomorrow" is rarely understood by 3-year-old children, but 4-year-olds understand the idea.

References

Future Days {{time-stub