Ian,

You are correct, the expression needs a '+1'

>>>In Edward's example, you might want to consider to use the 4 character year to be Y2K.
>>>? date()-ctod("01/01/"+str(year(date()))
>>
>>This is what I did. :)
>
>But this solution is wrong by one day! - my diary says today is the 106th day of the year - not the 105th :-)