Document Expiration - for very long expiration e.g. year 4000+ document is dropped or not even saved

http://docs.couchbase.com/developer/dev-guide-3.0/doc-expiration.html describes how the document expiration should be set for values below and above 30 days.

First comment: it is confusing to think about different value assigned to the same property, e.g. sec vs. unix time.

Second comment: due to bug in custom code using node.js sdk the expiration for 1 year time-frame was miss-computed into the far future e.g. year 4000+.
The save action resulted in no error, but fetch action resulted in document not found.