The date_in_past error code will not be applicable to all date properties, but will be returned when the value of a date property is used in logic such as determining which carrier service(s) are able to deliver a shipment.

For example, if today is 20th December 2021, and the following JSON is provided:

  {
  "requested_delivery_date": {
    "start": "1990-10-01T00:00:00+00:00",
    "end": "1990-10-01T23:59:59+00:00"
  }
}

This will result in a date_in_past error because it is not possible to book a shipment for delivery in the past.