Added Dates.py and Rev.py
diff --git a/Demo/classes/README b/Demo/classes/README
index 4efd316..f821f78 100644
--- a/Demo/classes/README
+++ b/Demo/classes/README
@@ -1,9 +1,11 @@
Examples of classes that implement special operators (see class.doc):
Complex.py Complex numbers
+Dates.py Date manipulation package by Tim Peters
Dbm.py Wrapper around built-in dbm, supporting arbitrary values
Range.py Example of a generator: re-implement built-in range()
Rat.py Rational numbers
+Rev.py Yield the reverse of a sequence
Vec.py A simple vector class
bitvec.py A bit-vector class by Jan-Hein B\"uhrman