--------------------datacite:date
The release date of the product.
Allowed values, examples, other constraints
YYYY, YYYY-MM-DD, YYYY-MM-DDThh:mm:ssTZD or any other format or level of granularity described in W3CDTF.
The type of date (occurrences: 1).
If Date is used, dateType is mandatory, and its value must be set to the DataCite term Issued.
Example
<date dateType="Issued">23-10-2017</date>