--- a/mercurial/changelog.py
+++ b/mercurial/changelog.py
@@ -44,11 +44,11 @@ class changelog(revlog):
             try:
                 when, offset = map(int, date.split(' '))
             except ValueError:
-                raise ValueError('invalid date: %r' % date)
+                raise ValueError(_('invalid date: %r') % date)
             if abs(when) > 0x7fffffff:
-                raise ValueError('date exceeds 32 bits: %d' % when)
+                raise ValueError(_('date exceeds 32 bits: %d') % when)
             if abs(offset) >= 43200:
-                raise ValueError('impossible time zone offset: %d' % offset)
+                raise ValueError(_('impossible time zone offset: %d') % offset)
         else:
             date = "%d %d" % util.makedate()
         list.sort()