diff --git a/AUTHORS b/AUTHORS
index 8a868ea1a..71e3fa176 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -120,7 +120,7 @@ The following submitted code, packages or analysis, and deserve special thanks:
   ribbon
   Daniel Shahaf
   Johannes Wienke
-  Harley Pig
+  Alan Young
 
 Thanks to the following, who submitted detailed bug reports and excellent
 suggestions:
diff --git a/ChangeLog b/ChangeLog
index 79a3468b2..be3120879 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -140,6 +140,8 @@
 - TW-1671 task add: segfault with foo-bar:1 (thanks to Daniel Shahaf).
 - TW-1675 project.not:something doesn't exclude project:something.subprojects
           (thanks to Ander).
+- TW-1687 task add due:som appears to be interpreted as 'someday' (thanks to
+          Alan Young).
 - Prevent potential task duplication during import for non-pending tasks.
 - Show the active context in "context list", if any is active.
 - Fix "task edit" dropping annotation text after newlines.
diff --git a/src/Dates.cpp b/src/Dates.cpp
index d4ef377b5..a4bb15228 100644
--- a/src/Dates.cpp
+++ b/src/Dates.cpp
@@ -25,6 +25,7 @@
 ////////////////////////////////////////////////////////////////////////////////
 
 #include <cmake.h>
+#include <algorithm>
 #include <stdlib.h>
 #include <time.h>
 #include <text.h>
@@ -209,7 +210,7 @@ bool namedDates (const std::string& name, Variant& value)
   }
 
   else if (closeEnough ("later",   name, minimum) ||
-           closeEnough ("someday", name, minimum))
+           closeEnough ("someday", name, std::max (minimum, 4)))
   {
     t->tm_hour = t->tm_min = t->tm_sec = 0;
     t->tm_year = 138;
diff --git a/test/tw-1687.t b/test/tw-1687.t
new file mode 100755
index 000000000..9667117dd
--- /dev/null
+++ b/test/tw-1687.t
@@ -0,0 +1,67 @@
+#!/usr/bin/env python2.7
+# -*- coding: utf-8 -*-
+###############################################################################
+#
+# Copyright 2006 - 2015, Paul Beckingham, Federico Hernandez.
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included
+# in all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+# OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+#
+# http://www.opensource.org/licenses/mit-license.php
+#
+###############################################################################
+
+import sys
+import os
+import unittest
+# Ensure python finds the local simpletap module
+sys.path.append(os.path.dirname(os.path.abspath(__file__)))
+
+from basetest import Task, TestCase
+from basetest import Taskd, ServerTestCase
+
+
+class TestBug1687(TestCase):
+    def setUp(self):
+        """Executed before each test in the class"""
+        self.t = Task()
+
+    def test_som(self):
+        """The named date 'som' should take precedence over 'someday', for an exact match"""
+        self.t("rc.abbreviation.minimum=2 add one due:som")
+        code, out, err = self.t("_get 1.due.year")
+        self.assertNotEqual("2038\n", out)
+
+        self.t("rc.abbreviation.minimum=3 add two due:som")
+        code, out, err = self.t("_get 2.due.year")
+        self.assertNotEqual("2038\n", out)
+
+        self.t("rc.abbreviation.minimum=4 add three due:som")
+        code, out, err = self.t("_get 3.due.year")
+        self.assertNotEqual("2038\n", out)
+
+        self.t("rc.abbreviation.minimum=4 add three due:some")
+        code, out, err = self.t("_get 4.due.year")
+        self.assertEqual("2038\n", out)
+
+
+if __name__ == "__main__":
+    from simpletap import TAPTestRunner
+    unittest.main(testRunner=TAPTestRunner())
+
+# vim: ai sts=4 et sw=4 ft=python