diff --git a/hgext/mq.py b/hgext/mq.py
--- a/hgext/mq.py
+++ b/hgext/mq.py
@@ -1265,7 +1265,7 @@
                     if user:
                         ph.setuser(user)
                     if date:
-                        ph.setdate('%s %s' % date)
+                        ph.setdate('%d %d' % date)
                     ph.setparent(hex(nctx.p1().node()))
                     msg = nctx.description().strip()
                     if msg == defaultmsg.strip():