True, but that depends on what exactly you're reading as a timestamp. Using localtime in perl for example (a very common method to read the system time) does n

True, but that depends on what exactly you're reading as a timestamp. Using localtime in perl for example (a very common method to read the system time) does not return a timestamp, but returns a formatted string (see: http://perldoc.perl.org/functions/localtime.html http://perldoc.perl.org/functions/localtime.html) that could easily be thrown off by a DST changeover.