datetime - Parsing dates with correct time zone in perl with core modules only -

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i have several checks dates read database. instance, have compare them perl script's local time. have determine calendar date of parsed date. in order have readable code, i have identical time zone information in both generated (localtime) , parsed (strptime) time objects.

the solution should 1-file only, task should done core perl modules (version 5.10). datetimemodule doesn't seem option.

the closest have come time::piece, there seems no way time object parsing identical 1 obtained time::piece::localtime(). 

use time::piece; use strict; use warnings; use 5.010;  sub mystrptime1 {     $datestr = shift;     $tzoffset = sprintf '%+03d00', localtime->tzoffset->hours;     $t = time::piece->strptime("$datestr $tzoffset", '%y%m%d %h:%m:%s %z'); }  sub mystrptime2 {     $datestr = shift;     $t = time::piece->strptime($datestr, '%y%m%d %h:%m:%s');     # interpreted gmt, subtract time zone offset :-(     return $t - time::piece::localtime->tzoffset; }  $format = '%y%m%d %h:%m:%s';  $strptime (\&mystrptime1, \&mystrptime2) {     $lt = time::piece::localtime();     "localtime $lt, tz offset ", $lt->tzoffset();      $str = $lt->strftime($format);     "str $str";     $g = $strptime->( $str );      "parsed time $g, tz offset ", $g->tzoffset();      "time difference is: ", $lt-$g;     "hour difference is: ", $lt->hour - $g->hour; }

what want both hour difference , time difference of zero, seems impossible.

i able make both solutions work by calling localtime on strptime result:

sub mystrptime1 {     $datestr = shift;     $tzoffset = sprintf '%+03d00', localtime->tzoffset->hours;     $t = time::piece->strptime("$datestr $tzoffset", '%y%m%d %h:%m:%s %z');     return time::piece::localtime($t->epoch); }  sub mystrptime2 {     $datestr = shift;     $t = time::piece->strptime($datestr, '%y%m%d %h:%m:%s');     # interpreted gmt, subtract time zone offset :-(     $t -= time::piece::localtime->tzoffset;     return time::piece::localtime($t->epoch); }

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