Description:
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When using timestamps in date/strftime in 1942 or before, php calculates a wrong date. 

The adodb date time library doesn't seem to have this problem.

Reproduce code:
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/* the wrong result */
$time = adodb_mktime(0,0,0,11,30,1939);
echo date("d-m-Y H:i",$time);

/* the good result with datetime library */
/* http://phplens.com/phpeverywhere/adodb_date_library */
//echo adodb_date("d-m-Y H:i",$time);

Expected result:
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screen output: 30-11-1939 00:00

Actual result:
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screen output: 29-11-1939 23:20