Your values seems to be displayed in Unix epoch time format, as in displaying number of seconds since 00:00:00 UTC, January 1st, 1970. Link to the wiki: UnixTime
Adding your numbers in this conversion calculator gives very sensible date time values: epochconverter.com
I was about to comment that, because @Alexander only pointed out the issue, not the solution to convert it (I still appreciate the clarification, because it was not making much sense).
Thanks you for sharing, Roger. And thanks for clarifying, Alexander.