https://www.commoncoreontologies.org/ont00001340
A Date Identifier that designates some Day by using a combination of Day, Week, Month, or Year Identifiers formatted according to an implementation of a Calendar System.
January 1, 2018; 1 January 2018; 01/01/18; 01Jan18
https://www.commoncoreontologies.org/InformationEntityOntology