... In order to stuff that Perl program here had to ...
- give up on using "q//" & "qq//" operators;
- switch to tab from space for indent😱;
- eschew "$unix_sec" loop variable for "$_";
- remove comments certainly & newlines😒
So Python version comes out to be bit more compact with fewer compromises in style, not to mention do not have to fake the time zone format string for UTC date-time.