Hi,
I am using 'addhour' to add hours to the date value. It gives me the
return value even less than the date passed as parameter. Following
is the command and its output. I am using firebird 1.5.1 on linux.

select addhour('2004-09-27',75) from rdb$database;

ADDHOUR
=========================

2004-09-25 03:41:43.2704

Regards:
JS