You can use phrases like by or
by the time (Tegen de tijd dat) and
in or
in a day's time /
in two months' time /
in five years' time etc. (meaning 'at the end of this period') to give the time period in which the action will be completed.
I won't have finished all my projects by next week.
By the time we get home, the children will have gone to bed.
I'll have finished in an hour and then we can watch a film.
In two years' time, I'll have graduated from high school.