The "end" of universal time

[giba@gte.com (Glenn Iba)]

I know this hardly qualifies as a major issue, but I'm curious
as too why Universal Time in MCL stops after 884763176575 ??
(I noticed this after playing around in response to the posting
 about the 3 billionth second of universal time, which I found
 amusing - thanks Rodney!)

In MCL 2.0.1 on my Power Mac I get the following:


(decode-universal-time 884763176575 0)
55
2
13
11
1
29937
0
NIL
0

(decode-universal-time 884763176576 0)
0
0
0
1
1
1900
6
NIL
0
? 

And all larger values of Universal-time appear to map
to this same date (1-1-1900).

Any insights?? Is this a bug or some obscure efficiency hack!?

Thanks,
Glenn