decode-universal-time

Greetings!  There seems to have been an anomaly in the historical
definitions of time zones leading to the following as shown by gcl and
here also sbcl:

  0: (DECODE-UNIVERSAL-TIME 1162399270 16)
  0: DECODE-UNIVERSAL-TIME returned 10 41 0 1 11 1936 6 NIL 16
  0: (DECODE-UNIVERSAL-TIME 1796226070 16)
  0: DECODE-UNIVERSAL-TIME returned 10 41 23 1 12 1956 5 NIL 16

The two times provided are exactly 7336 days apart to the second, yet
there is an hour discrepancy in the results.  I seem to recall reading a
long time ago that there were one off redefinitions of the time zones in
the past.  Can anyone enlighten me?

Take care,
-- 
Camm Maguire			     		    [email protected]
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"The earth is but one country, and mankind its citizens."  --  Baha'u'llah