der…thanks 
BUT…now I’ve realized a problem. It seems because I’m modifying the summary…its breaking my check_todo function to see if an existing todo is there and if so update the date (instead of creating a new todo). Now it is keeping the original todo, and creating a new todo at the new changed date.
property summaryList : {"Rough Ceramics", "Tooling Quote", "Casting Ceramic", "Tooling PO", "Paint Photos (MASS)", "Blister Layout", "Production Quote", "Vendor Confirmed", "Paint Master", "Decals (MASS)", "Paint Photos (CL)", "Decals (CL)", "1st Shots (New Figures)", "EP Shots (Old Figures)", "PO Breakdown", "Mockups", "EP Shots (New Figures)", "1st Deco", "PO", "Packaging Files", "Chromalins", "Blister Release", "Injection Release", "Deco Release", "Press Proofs", "Printing Release", "PP"}
tell application "Microsoft Excel"
set ProjectName to the value of cell "$B$2"
set range_value_List to (get value of range "E4:E37")
set range_value to {}
repeat with i from 1 to (count range_value_List)
set end of range_value to item 1 of (item i of range_value_List)
end repeat
set {RoughCeramics, blind, ToolingQuote, CastingCeramic, blind, ToolingPO, blind, PaintPhotosMASS, BlisterLayout, ProductionQuote, VendorConfirmed, PaintMaster, DecalsMASS, DecalsCL, PaintPhotosCL, FirstShotsNew, EPShotsOld, POBreakdown, Mockups, EPShotsNew, firstDeco, PO, blind, blind, PackagingFiles, Chromalins, BlisterRelease, InjectionRelease, blind, DecoRelease, PressProofs, blind, PrintingRelease, PP} to range_value
close front window
end tell
tell application "iCal"
if not (exists calendar ProjectName) then
tell (make new calendar at end of calendars with properties {name:ProjectName})
set its color to {13500, 28500, 48500}
end tell
end if
set dateList to {RoughCeramics, ToolingQuote, CastingCeramic, ToolingPO, PaintPhotosMASS, BlisterLayout, ProductionQuote, VendorConfirmed, PaintMaster, DecalsMASS, DecalsCL, PaintPhotosCL, FirstShotsNew, EPShotsOld, POBreakdown, Mockups, EPShotsNew, firstDeco, PO, PackagingFiles, Chromalins, BlisterRelease, InjectionRelease, DecoRelease, PressProofs, PrintingRelease, PP}
repeat with i from 1 to count summaryList
set theDate to my calcDate(item i of dateList)
set {theTodo, isCompleted} to my check_Todo(ProjectName, (item i of summaryList) & " - " & ProjectName)
if class of theDate is date then
if theTodo is false then
make new todo at end of todos of calendar ProjectName with properties {due date:theDate, description:ProjectName, summary:(item i of summaryList) & " - " & ProjectName}
else
if isCompleted is false then set due date of theTodo to theDate
end if
end if
end repeat
end tell
on calcDate(d)
if class of d is date then return d
if d is "" or d is in {"N/A", "NA", "on hold"} then return false
set delim to item (((d contains "/") as integer) + 1) of {".", "/"}
set {TID, text item delimiters} to {text item delimiters, delim}
try
set {mn, dy, yr} to text items of d
set yr to yr mod 1000 + 2000
-- old line for above-- if yr as integer < 10 then set yr to (yr as integer) + 2000
set text item delimiters to TID
tell (current date) to set d to it - (its time)
tell d to set {its day, its month, its year} to {dy as integer, mn as integer, yr as integer}
return d
on error
set text item delimiters to TID
return false
end try
end calcDate
on check_Todo(cal, param)
tell application "iCal"
tell calendar cal
repeat with tt in (get todos)
tell contents of tt
if summary is param then
set c to completion date
if c is missing value then
return {it, false}
else
return {it, true}
end if
end if
end tell
end repeat
end tell
return {false, false}
end tell
end check_Todo