The latest probable date at which an event in an object’s history is thought to have occurred.
How to record
Always record the day, month and year in the same order. Always use the same character to separate each component. Be as specific as possible and indicate if the date is not known. Record all four digits for the year.
08/10/1990; 06/1972; 1899; 2017-12-17
Record once only for a Date if required.