I found another way to add the days. Instead of using the julian date I am just adding days to my IF statement. So far it works, it will need to test it out a little more using different dates but it works so far.
if [string equal $juliant_day “Fri”] {
set dt [clock format [clock scan “3 days”] -format %y%m%d]
echo jult date= $dt
} elseif [string equal $juliant_day “Sat”] {
set dt [clock format [clock scan “2 days”] -format %y%m%d]
echo jult date= $dt
} else {
set dt [clock format [clock scan “1 days”] -format %y%m%d]
echo jult date= $dt
}