diff -r 234021dcad93 Lib/datetime.py
--- a/Lib/datetime.py	Wed May 25 02:35:58 2011 +0200
+++ b/Lib/datetime.py	Tue May 24 20:49:47 2011 -0500
@@ -633,7 +633,8 @@ class date:
     fromtimestamp()
     today()
     fromordinal()
-
+    fromisocalendar()
+    
     Operators:
 
     __repr__, __str__
@@ -690,7 +691,7 @@ class date:
 
     @classmethod
     def fromordinal(cls, n):
-        """Contruct a date from a proleptic Gregorian ordinal.
+        """Construct a date from a proleptic Gregorian ordinal.
 
         January 1 of year 1 is day 1.  Only the year, month and day are
         non-zero in the result.
@@ -698,6 +699,28 @@ class date:
         y, m, d = _ord2ymd(n)
         return cls(y, m, d)
 
+    @classmethod
+    def fromisocalendar(cls, s):
+        """Construct a date from ISO 8601 year, week, and day number
+
+        Accepts a string in the form YYYYWWD, where
+            YYYY is the four-digit year,
+            WW is the week number, and
+            D is the day number (1-7).
+        """
+        year = s[0:4]
+        isoweek = s[4:6]
+        isoday = s[6:7]
+        
+        # convert to an ordinal date for the year
+        week1monday = _isoweek1monday(year)
+        n = (isoweek * 7) + isoday - (week1monday + 3)
+        # add the days before the year
+        n += _days_before_year(year)
+        
+        y, m, d = _ord2ymd(n)
+        return cls(y, m, d)
+
     # Conversions to string
 
     def __repr__(self):