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.
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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 |