By years
Usually duration of a day dream is reduced by years, and duration of a night dream remains to the same.
From to years the night dream of the child is usually reduced by an hour, i.
e.
he will lay down at o'clock in the evening if rises at o'clock in the morning.
By years it can be stacked at o'clock in the evening, i.
e.
on an hour later.
These are average figures.
More long dream, and another less long is necessary for one children.
Many children refuse to sleep in the afternoon in years, but the day dream is necessary for most of children till years, and if not a dream, then afterdinner rest with quiet occupations in the room.