It sounds that on "one or two" of your servers, there is a program time.exe installed, most likely from the Cygwin suite of programs, which preempts the shell builtin time command.

To solve your problem, maybe you want to look at the Perl builtin functions of localtime and gmtime() together with the POSIX::strftime() function:

use strict;
use warnings;
use POSIX qw(strftime);

print strftime "%Y:%m:%d %H:%M:%S", localtime();
[download]

There are lots of format strings that strftime knows to insert into your string, like the weekday and more, should you need it.