All records returned by our API have a set of timestamps attached for reference. You'll see two fields: created_at and updated_at. The created timestamp is the datetime that the record was created. The updated timestamp is the datetime of the last update to that record.
These timestamps adhere to the ISO 8601 standard. For example - January 26, 1978 at 21:10:00 UTC would be represented as "1978-01-26T21:10:00Z".