Hi Madocar
Unless I am reading your post wrong, adding 57 days to 17 July will give you the 12th of September? What are the hours and minutes in your start date? This is important to get the hours and minutes in your end date calculation.
Yes it is possible and here is my take based on the above data. In A2 put the date;
17/7/2013
In B2put your countdown data
57 days 22 hours 13 minutes
In C2 put the following;
=A2 +MID(B2, 1, FIND("d", B2)-2)+TIME(MID(B2, FIND("s", B2)+2, FIND("h", B2)-FIND("s", B2)-2), MID(B2, FIND("rs", B2)+3, FIND("m", B2)-FIND("rs", B2)-3), 0)
It isolates each instance of the words you have above to extract the numbers. Format Cell C2 as required.
Take care
Smallman