diff --git a/src/app/Data.php b/src/app/Data.php
index ab7e206..96613ae 100644
--- a/src/app/Data.php
+++ b/src/app/Data.php
@@ -4,7 +4,7 @@ declare(strict_types=1);
 namespace MyPrayerJournal;
 
 use BitBadger\PgSQL\Documents\{ Configuration, Definition, Document, DocumentIndex, Query };
-use MyPrayerJournal\Domain\{ History, JournalRequest, Note, Request, RequestAction };
+use MyPrayerJournal\Domain\{ AsOf, History, JournalRequest, Note, Request, RequestAction };
 
 class Data
 {
@@ -114,8 +114,7 @@ class Data
     public static function getAnsweredRequests(string $userId): array
     {
         $answered = Data::getJournalByAnswered($userId, '==');
-        usort($answered,
-            fn (JournalRequest $a, JournalRequest $b) => $a->asOf == $b->asOf ? 0 : ($a->asOf > $b->asOf ? -1 : 1));
+        usort($answered, AsOf::newestToOldest(...));
         return $answered;
     }
 
@@ -128,8 +127,7 @@ class Data
     public static function getJournal(string $userId): array
     {
         $reqs = data::getJournalByAnswered($userId, '<>');
-        usort($reqs,
-            fn (JournalRequest $a, JournalRequest $b) => $a->asOf == $b->asOf ? 0 : ($a->asOf < $b->asOf ? -1 : 1));
+        usort($reqs, AsOf::oldestToNewest(...));
         return $reqs;
     }
 }
diff --git a/src/app/domain/AsOf.php b/src/app/domain/AsOf.php
new file mode 100644
index 0000000..99ffea2
--- /dev/null
+++ b/src/app/domain/AsOf.php
@@ -0,0 +1,34 @@
+<?php
+declare(strict_types=1);
+
+namespace MyPrayerJournal\Domain;
+
+trait AsOf
+{
+    /** The "as of" date/time */
+    public \DateTimeImmutable $asOf;
+
+    /**
+     * Sort an as-of item from oldest to newest
+     * 
+     * @param AsOf $a The first item to compare
+     * @param AsOf $b The second item to compare
+     * @return int 0 if they are equal, -1 if A is earlier than B, or 1 if B is earlier than A
+     */
+    public static function oldestToNewest(AsOf $a, AsOf $b): int
+    {
+        return $a->asOf == $b->asOf ? 0 : ($a->asOf < $b->asOf ? -1 : 1);
+    }
+    
+    /**
+     * Sort an as-of item from newest to oldest
+     * 
+     * @param AsOf $a The first item to compare
+     * @param AsOf $b The second item to compare
+     * @return int 0 if they are equal, -1 if B is earlier than A, or 1 if A is earlier than B
+     */
+    public static function newestToOldest(AsOf $a, AsOf $b): int
+    {
+        return $a->asOf == $b->asOf ? 0 : ($a->asOf > $b->asOf ? -1 : 1);
+    }
+}
diff --git a/src/app/domain/History.php b/src/app/domain/History.php
index e9f0923..73f9a14 100644
--- a/src/app/domain/History.php
+++ b/src/app/domain/History.php
@@ -3,15 +3,12 @@ declare(strict_types=1);
 
 namespace MyPrayerJournal\Domain;
 
-use DateTimeImmutable;
-
 /**
  * A record of action taken on a prayer request, including updates to its text
  */
 class History
 {
-    /** The date/time this action was taken */
-    public DateTimeImmutable $asOf;
+    use AsOf;
 
     /** The action taken that generated this history entry */
     public RequestAction $action = RequestAction::Created;
@@ -21,7 +18,7 @@ class History
 
     public function __construct()
     {
-        $this->asOf = new DateTimeImmutable('1/1/1970', new \DateTimeZone('Etc/UTC'));
+        $this->asOf = new \DateTimeImmutable('1/1/1970', new \DateTimeZone('Etc/UTC'));
     }
 
     public function isCreated(): bool
diff --git a/src/app/domain/JournalRequest.php b/src/app/domain/JournalRequest.php
index 3dbcb59..4e3f901 100644
--- a/src/app/domain/JournalRequest.php
+++ b/src/app/domain/JournalRequest.php
@@ -8,6 +8,8 @@ namespace MyPrayerJournal\Domain;
  */
 class JournalRequest
 {
+    use AsOf;
+
     /** The ID of the prayer request */
     public string $id = '';
 
@@ -17,9 +19,6 @@ class JournalRequest
     /** The current text of the request */
     public string $text = '';
 
-    /** The date/time this request was last updated */
-    public \DateTimeImmutable $asOf;
-
     /** The date/time this request was last marked as prayed */
     public \DateTimeImmutable $lastPrayed;
 
@@ -69,18 +68,15 @@ class JournalRequest
             $this->recurrenceType = $req->recurrenceType;
             $this->recurrence     = $req->recurrence;
 
-            usort($req->history,
-                fn (History $a, History $b) => $a->asOf == $b->asOf ? 0 : ($a->asOf > $b->asOf ? -1 : 1));
-            $this->asOf = $req->history[0]->asOf;
-            $this->lastPrayed =
-                array_values(array_filter($req->history, fn (History $it) => $it->action == RequestAction::Prayed))[0]
-                ?->asOf;
+            usort($req->history, AsOf::newestToOldest(...));
+            $this->asOf       = $req->history[0]->asOf;
+            $this->lastPrayed = array_values(
+                array_filter($req->history, fn (History $it) => $it->isPrayed()))[0]?->asOf;
             
             if ($full) {
-                usort($req->notes,
-                    fn (Note $a, Note $b) => $a->asOf == $b->asOf ? 0 : ($a->asOf > $b->asOf ? -1 : 1));
+                usort($req->notes, AsOf::newestToOldest(...));
                 $this->history = $req->history;
-                $this->notes = $req->notes;
+                $this->notes   = $req->notes;
             }
         }
     }
diff --git a/src/app/domain/Note.php b/src/app/domain/Note.php
index 17e3861..811534a 100644
--- a/src/app/domain/Note.php
+++ b/src/app/domain/Note.php
@@ -8,8 +8,7 @@ namespace MyPrayerJournal\Domain;
  */
 class Note
 {
-    /** The date/time this note was entered */
-    public \DateTimeImmutable $asOf;
+    use AsOf;
 
     /** The note */
     public string $notes = '';