Date

Date

Definition

Date associated with the creation of the original resource.

Required?

No

Repeatable?

Yes


Guidelines #

  • Record the date in ISO 8601 /EDTF format.

    • The LDR application will display EDTF date in a human-readable format in the public-facing user interface.
  • For published materials, use the Issued property instead.

  • Avoid using abbreviations or Latin terms for dates.

Examples #

Encoding Date field value (encoded EDTF) Display Date
yyyy 1861 1861
yyyy-mm 2011-07 July 2011
yyyy-mm-dd 1451-04-22 April 22, 1451
yyyy-mm-dd/yyyy-mm-dd 1992-06-10/1999-07-31 June 10, 1992 to July 31, 1999
yyyy~/yyyy~ 1910~/1915~ Circa 1910 to circa 1915
yyyy~ 33 Circa 33