date picker

How do I change the date picker to show sunday as first day?

I have tryed the following, and it doesn't work.

The below is from another forum post:
To change the week format open "List page: Before display" event of calmonthly view.
Find the following code snippet:

$xt->assign("row00sdname1",$ndays[1]);

$xt->assign("row00sdname2",$ndays[2]);

$xt->assign("row00sdname3",$ndays[3]);

$xt->assign("row00sdname4",$ndays[4]);

$xt->assign("row00sdname5",$ndays[5]);

$xt->assign("row00sdname6",$ndays[6]);

$xt->assign("row00sdname7",$ndays[7]);
Replace it with this one:

$xt->assign("row00sdname1",$ndays[7]);

$xt->assign("row00sdname2",$ndays[1]);

$xt->assign("row00sdname3",$ndays[2]);

$xt->assign("row00sdname4",$ndays[3]);

$xt->assign("row00sdname5",$ndays[4]);

$xt->assign("row00sdname6",$ndays[5]);

$xt->assign("row00sdname7",$ndays[6]);
Also find and delete the following line of code:

$wd=$wd-1;
Where it says Find the following code snippet:, I cannot find that

anywhere.

Any help is appreciated.