This is off from the main question but why run two different scripts on odd days? Just run one script. Have it copy the older file back and then create a new file.

use File::Copy;
move '/path/newsite2.txt', '/path/newsite3.txt'; #just in case
move '/path/newsite1.txt', '/path/newsite2.txt'; #Back up
#create newsite1.txt
[download]

Really, maintaining just one script is worth the extra line or two...

--
$you = new YOU;
honk() if $you->love(perl)