hfuxelius@gmail.com writes:
> test to run: select to_timestamp('2011,03,27,02,11,11',
> 'YYYY,MM,DD,HH24,MI,SS')
> and the run: select to_timestamp('2011,03,27,03,11,11',
> 'YYYY,MM,DD,HH24,MI,SS')
> It miscalculates 02 hour to 03 hour by some reason
If that date is a DST forward transition date in your timezone, then
this behavior is neither surprising nor a bug.
regards, tom lane