Returns the current week in format: YYYY-MM-DD - YYYY-MM-DD. Start of the week is monday. End of the week is Sunday.

current_week_textexpander.applescript

-- Sean Korzdorfer
-- 2013-01-21
-- Fork of benwaldie Current Week Range TextExpander snippet: https://gist.github.com/4583398

set theDate to (current date)
set theStartDate to theDate
repeat until weekday of theStartDate = Monday
    set theStartDate to theStartDate - 1 * days
end repeat
set theEndDate to theDate
repeat until weekday of theEndDate = Sunday
    set theEndDate to theEndDate + 1 * days
end repeat

-- Original Script Date Formatting:
-- set theDate to (short date string of theStartDate) & " - " & (short date string of theEndDate)
set theDate to (year of theStartDate as string) & "-" & (my add_zero(month of theStartDate as integer)) & "-" & (my add_zero(day of theStartDate as integer)) & " - " & (year of theEndDate as string) & "-" & (my add_zero(month of theEndDate as integer)) & "-" & (my add_zero(day of theEndDate as integer))

on add_zero(theNumber)
    if theNumber < 10 then
        return "0" & (theNumber as string)
    else
        return theNumber as string
    end if
end add_zero