diff --git a/ChangeLog b/ChangeLog
index a098cae4c..ee3ca1049 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -6,6 +6,7 @@
           (thanks to Michele Santullo).
 - TW-1313 some recurring intervals reset due time to midnight
           (thanks to James Dietrich).
+- TW-1425 The 'age' format rounds in odd ways (thanks to Black Ops testing).
 - TW-1446 Difference in how relative dates are specified in report filters since 2.3.0
           (thanks to atomicules).
 - TW-1500 Dates formatted as ".age", ".remaining", or ".countdown" often give
diff --git a/src/ISO8601.cpp b/src/ISO8601.cpp
index 91eb9bee9..870359346 100644
--- a/src/ISO8601.cpp
+++ b/src/ISO8601.cpp
@@ -1951,14 +1951,24 @@ const std::string ISO8601p::format () const
 }
 
 ////////////////////////////////////////////////////////////////////////////////
+// Range      Representation
+// ---------  ---------------------
+// >= 365d    {n.n}y
+// >= 90d     {n}mo
+// >= 14d     {n}w
+// >= 1d      {n}d
+// >= 1h      {n}h
+// >= 1min    {n}min
+//            {n}s
+//
 const std::string ISO8601p::formatVague () const
 {
   float days = (float) _period / 86400.0;
 
   std::stringstream formatted;
        if (_period >= 86400 * 365) formatted << std::fixed << std::setprecision (1) << (days / 365) << "y";
-  else if (_period >= 86400 * 84)  formatted << static_cast <int> (days / 30)       << "mo";
-  else if (_period >= 86400 * 13)  formatted << static_cast <int> (days / 7)        << "w";
+  else if (_period >= 86400 * 90)  formatted << static_cast <int> (days / 30)       << "mo";
+  else if (_period >= 86400 * 14)  formatted << static_cast <int> (days / 7)        << "w";
   else if (_period >= 86400)       formatted << static_cast <int> (days)            << "d";
   else if (_period >= 3600)        formatted << static_cast <int> (_period / 3600)  << "h";
   else if (_period >= 60)          formatted << static_cast <int> (_period / 60)    << "min";
diff --git a/test/columns.t b/test/columns.t
index cc226bfdf..e6409610b 100755
--- a/test/columns.t
+++ b/test/columns.t
@@ -372,8 +372,8 @@ class TestDateFormats(TestCase):
     def test_date_format_age(self):
         """Verify due.age formatting"""
         code, out, err = self.t("xxx rc.report.xxx.columns:id,due.age")
-        self.assertRegexpMatches(out, r'1\s+1d')
-        self.assertRegexpMatches(out, r'2\s+-16h')
+        self.assertRegexpMatches(out, r'1\s+[0-9.]+d')
+        self.assertRegexpMatches(out, r'2\s+-[0-9.]+h')
 
     def test_date_format_remaining(self):
         """Verify due.remaining formatting"""