Thanks johnbio,

A couple of years ago I wrote a calendar in Perl that uses the fact that the calendar repeats every 400 years. Because of your observation, I verified that my calendar agrees that 'Perl is 10_000 days' old on 05/05/2015. I know you didn't expect it to be a test case, but thanks for both the observation and the 'test case'.

I also noted that I've been married for 17,013 days as of 05/05/2015. I hope you can post in 2042 ( I doubt I'll be around :-).

Thanks again, and 'long live Perl' ( Note: I did a JPEG of the calendar entry, but couldn't find how to post an image as part of this comment. Maybe a friendly monk would know? )

Best Regards...Ed