diff --git a/Command.py b/Command.py
index 60bd3cd..4d80ec2 100644
--- a/Command.py
+++ b/Command.py
@@ -43,9 +43,10 @@ class Command:
         m = re.match('^(?:(\d{4})[-/])?(\d{1,2})[-/](\d{1,2}),(.*)$', timespec)
         if m is not None:
             # a date was given
-            if m.group(1) != '':
-                the_time = the_time.replace(year = m.group(1))
-            the_time = the_time.replace(month = m.group(2), day = m.group(3))
+            if m.group(1) is not None:
+                the_time = the_time.replace(year = int(m.group(1)))
+            the_time = the_time.replace(month = int(m.group(2)),
+                    day = int(m.group(3)))
             timespec = m.group(4)
         m = re.match('^(\d{1,2}):?(\d{2})?(am?|pm?)?$', timespec, re.I)
         if m is not None: