...
do date -d $s +'%u %H %M'
...

[download]

On CentOS 5, in zsh 4, $s needed to be put in quotes; else date was suggesting to consult date --help.

In reply to Re: Graphing Git commits with git + sh + Perl + Gnuplot by parv
in thread Graphing Git commits with git + sh + Perl + Gnuplot by Bucciarati

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