due date

Short definition from Wiktionary

Noun

1. 1
   The date on which a pregnant female is expected to give birth, which is determined by the term for the species.
2. 2
   The date of payment in financial arrangements.
3. 3
   The date by which a book (or other item) borrowed from a library must be returned.
4. 4
   The date by which a task is supposed to be completed.