The date of payment in financial arrangements.
The date on which a pregnant woman is expected to give birth.
The date by which a book (or other item) borrowed from a library must be returned.
The date by which a task is supposed to be completed.
A period of three months or about three months; (financial): quarter.
One of the terms of an academic year in those learning institutions that divide their teaching in three roughly equal terms, each about three months long. Compare semester.