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#!/bin/sh
getweekday()
{
perl -e '
use Time::Local; use Time::localtime;
($year, $mon, $mday) = split(/[\/-]/, "'$1'");
print localtime(timelocal(0, 0, 0, $mday, $mon - 1, $year))->wday;
'
}
date
echo `getweekday "2010-07-01"`
echo `getweekday "2010/07/02"`
echo day month year | awk '{for(i=1;i<=NF;i++)if($i~/day/)print i}'
datestr=20100627
weekday=`date -d "$datestr" "+%w"`
echo $weekday