DateTime

{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "title": "DateTime",
  "description": "A date and time value using either RFC3339 or UNIX time representation.",
  "type": "string",
  "format": "The RFC 3339 representation is a string conforming to https://tools.ietf.org/rfc/rfc3339.txt. The Unix representation is a string representing the number of seconds since the Unix Epoch (January 1st, 1970 at UTC). The value is a fractional number, where the fractional part represents a fraction of a second (up to nine decimal places)."
}