time zone that recognizes DST), this means interval '1 day'
does not necessarily equal interval '24 hours'.
For example, with the session time zone set to CST7CDT,
- timestamp with time zone '2005-04-02 12:00-07' + interval '1 day'
+ timestamp with time zone '2005-04-02 12:00-07' + interval '1 day'
will produce timestamp with time zone '2005-04-03 12:00-06',
while adding interval '24 hours' to the same initial
timestamp with time zone produces