due date

This term carries a strong sense of obligation or expectation. In professional or financial contexts, it functions as a hard deadline, where missing the date often triggers penalties, late fees, or negative evaluations. It is more specific than a deadline, as it refers to the calendar date itself rather than the time of day.

In the context of pregnancy, the term is an estimate rather than a strict requirement. Because biological processes vary, it is common to refer to this as an expected date, though "due date" remains the standard colloquial and medical shorthand.