diff --git a/AUTHORS b/AUTHORS
index 2d385ac5c..3e4dae85a 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -182,3 +182,6 @@ suggestions:
   Friedrich Heusler
   Ben Armstrong
   XTaran
+  John West
+  Dmitriy Matrosov
+  Michele Santullo
diff --git a/ChangeLog b/ChangeLog
index c581984d1..aaa873591 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -67,7 +67,11 @@ Bugs
    Wilk).
  + #1263 The 'waiting' report properly lists only pending tasks with a wait date
    (thanks to Fidel Mato).
+ + #1268 Edit doesn't accept changes, if task has completed dependency (thanks
+   to Dmitriy Matrosov, Michele Santullo).
  + #1270 The 'undo' command is now properly removing backlog entries.
+ + #1273 Query with negative relative date differs greatly from absolute date
+   in past (thanks to John West).
  + #1279 Assorted corrections to the task-ref.pdf document (thanks to Benjamin
    Weber).
  + #1286 Cannot use "sow", "som", etc in "entry.after", "end.after" filters
@@ -80,6 +84,7 @@ Bugs
  + #1387 ZSH Auto-Completion dates are not current (thanks to Benjamin Weber).
  + #1388 Updated task(1) man pages with import/export script examples (thanks to
    Benjamin Weber).
+ + #1410 Incomplete Date Synonym List in man task (thanks to Benjamin Weber).
  + Fixed bug so that 'limit:page' now considers footnote messages.
  + Fixed bug where specifying an ID of 0 yielded all completed/deleted tasks
    (thanks to greenskeleton).
diff --git a/doc/man/task.1.in b/doc/man/task.1.in
index 12d0f4036..c58989bb1 100644
--- a/doc/man/task.1.in
+++ b/doc/man/task.1.in
@@ -890,6 +890,22 @@ This sets the wait date to 1/18/2038.
 .TP
 Next occurring weekday
 task ... due:fri
+
+.TP
+Predictable holidays
+task ... due:goodfriday    
+.br
+task ... due:easter    
+.br
+task ... due:eastermonday    
+.br
+task ... due:ascension    
+.br
+task ... due:pentecost    
+.br
+task ... due:midsommar    
+.br
+task ... due:midsommarafton
 .RE
 
 .SS FREQUENCIES
diff --git a/src/Duration.cpp b/src/Duration.cpp
index 57246dd98..2919e861d 100644
--- a/src/Duration.cpp
+++ b/src/Duration.cpp
@@ -368,6 +368,8 @@ bool Duration::valid (const std::string& input)
   Nibbler n (lower_input);
   n.getNumber (value);
 
+  // Negative values are valid, but do not need to complicate the validation
+  // check.
   if (value < 0.0)
     value = -value;
 
diff --git a/src/E9.cpp b/src/E9.cpp
index 7464ebd4c..5cc4bcd88 100644
--- a/src/E9.cpp
+++ b/src/E9.cpp
@@ -185,7 +185,10 @@ void E9::eval (const Task& task, std::vector <Arg>& value_stack)
           {
             Duration dur (operand._raw);
             Date now;
-            now += (int)(time_t) dur;
+            if (dur.negative ())
+              now -= (int)(time_t) dur;
+            else
+              now += (int)(time_t) dur;
             operand._value  = now.toEpochString ();
           }
           else
diff --git a/src/Task.cpp b/src/Task.cpp
index 3ff4ccfe4..30a28c199 100644
--- a/src/Task.cpp
+++ b/src/Task.cpp
@@ -990,11 +990,6 @@ void Task::addDependency (const std::string& uuid)
   if (uuid == get ("uuid"))
     throw std::string (STRING_TASK_DEPEND_ITSELF);
 
-  // Check that uuid is resolvable.
-  int id = context.tdb2.pending.id (uuid);
-  if (id == 0)
-    throw format (STRING_TASK_DEPEND_MISS_CREA, id);
-
   // Store the dependency.
   std::string depends = get ("depends");
   if (depends != "")
diff --git a/src/commands/CmdEdit.cpp b/src/commands/CmdEdit.cpp
index 03b24f718..d716f64fd 100644
--- a/src/commands/CmdEdit.cpp
+++ b/src/commands/CmdEdit.cpp
@@ -660,20 +660,10 @@ void CmdEdit::parseTask (Task& task, const std::string& after, const std::string
   std::vector <std::string>::iterator dep;
   for (dep = dependencies.begin (); dep != dependencies.end (); ++dep)
   {
-    std::vector <int> ids;
-
-    // Crude UUID check
-    if (dep->length () == 36)
-    {
-      int id = context.tdb2.pending.id (*dep);
-      ids.push_back (id);
-    }
+    if (dep->length () >= 7)
+      task.addDependency (*dep);
     else
-      A3::extract_id (*dep, ids);
-
-    std::vector <int>::iterator id;
-    for (id = ids.begin (); id != ids.end(); id++)
-      task.addDependency (*id);
+      task.addDependency ((int) strtol (dep->c_str (), NULL, 10));
   }
 
   // UDAs
diff --git a/src/commands/Command.cpp b/src/commands/Command.cpp
index a713691b8..6bd27c00f 100644
--- a/src/commands/Command.cpp
+++ b/src/commands/Command.cpp
@@ -463,7 +463,7 @@ void Command::modify_task (
   std::string& description)
 {
   // Utilize Task::modify
-  task.modify(arguments, description);
+  task.modify (arguments, description);
 }
 
 ////////////////////////////////////////////////////////////////////////////////
diff --git a/test/duration.t.cpp b/test/duration.t.cpp
index 374c8563e..7c9097b43 100644
--- a/test/duration.t.cpp
+++ b/test/duration.t.cpp
@@ -51,7 +51,7 @@ int convertDuration (const std::string& input)
 
 int main (int argc, char** argv)
 {
-  UnitTest t (644);
+  UnitTest t (646);
 
   // Ensure environment has no influence.
   unsetenv ("TASKDATA");
@@ -728,6 +728,11 @@ int main (int argc, char** argv)
   t.is (convertDuration ("10d"),          10, "valid duration 10d");
 
   t.is (convertDuration ("-"),             0, "valid duration -");
+
+  d = Duration ("-4d");
+  t.is ((time_t)d, 4*86400, "-4d == 4*86400");
+  t.ok (d.negative (),      "-4d == negative");
+
   try
   {
     Duration left, right;