Date certain

Date certain is a legal term for the date on or by which the actions of a contract can be reasonably completed. Ambiguity may nonetheless result, for example when a contract requires that action be taken "by" a specified date that may mean either "by a certain date" or "on or before a certain date".{{cite book |title=Black's law dictionary: definitions of the terms and phrases of American and English jurisprudence ancient and modern |date=1990 |publisher=West Publ |location=St. Paul, Minn |isbn=9780314762719 |page=210 |edition=6}}