diff --git a/README.md b/README.md
index e41a42f..e07aca0 100644
--- a/README.md
+++ b/README.md
@@ -467,10 +467,10 @@ import pytz
 
 ### Constructors
 ```python
-<D>      = date(year, month, day)
-<T>      = time(hour=0, minute=0, second=0, microsecond=0, tzinfo=None, fold=0)
-<DT>     = datetime(year, month, day, hour=0, minute=0, second=0, microsecond=0, tzinfo=None, fold=0)
-<TD>     = timedelta(days=0, seconds=0, microseconds=0, milliseconds=0, minutes=0, hours=0, weeks=0)
+<date>      = date(year, month, day)
+<time>      = time(hour=0, minute=0, second=0, microsecond=0, tzinfo=None, fold=0)
+<datetime>  = datetime(year, month, day, hour=0, minute=0, second=0, microsecond=0, tzinfo=None, fold=0)
+<timedelta> = timedelta(days=0, seconds=0, microseconds=0, milliseconds=0, minutes=0, hours=0, weeks=0)
 ```
 * **`'fold=1'` means second pass in case of time jumping back for one hour.**
 * **Use `'<D/DT>.weekday()'` to get day of the week (Mon == 0).**