shell try

gistfile1.sh

farseer ~ $  cat inner.sh 
#!/bin/sh
echo $@
farseer ~ $  cat month_props.sh
#!/bin/sh

./inner.sh $@
echo `date`
farseer ~ $  cat try.sh
#!/bin/bash
fromDay="2010-1-1"
endDay="2012-1-1"

initSec=`date -d $fromDay +%s`
finiSec=`date -d $endDay +%s`

for (( i = $initSec ; i <= $finiSec ; i += 24 * 3600 ))
do
   day=`date -d "1970-1-1 UTC $i seconds" +%F`
   y=`date +%Y --date="$day"`
   m=`date +%m --date="$day"`
   d=`date +%d --date="$day"`
   date=`date +%Y%m%d --date="$day"`
   ./month_props.sh $date
   #echo $da
done