diff --git a/src/ChurchCRM/Emails/notifications/BirthdayEmail.php b/src/ChurchCRM/Emails/notifications/BirthdayEmail.php
new file mode 100644
index 0000000000..ccc956e7c0
--- /dev/null
+++ b/src/ChurchCRM/Emails/notifications/BirthdayEmail.php
@@ -0,0 +1,84 @@
+<?php
+
+namespace ChurchCRM\Emails\notifications;
+
+use ChurchCRM\dto\SystemConfig;
+use ChurchCRM\Emails\BaseEmail;
+use ChurchCRM\model\ChurchCRM\Person;
+
+class BirthdayEmail extends BaseEmail
+{
+    private Person $person;
+
+    /**
+     * @param string[] $toAddresses
+     */
+    public function __construct(array $toAddresses, Person $person)
+    {
+        $this->person = $person;
+        parent::__construct($toAddresses);
+        $this->mail->Subject = SystemConfig::getValue('sChurchName') . ': ' . $this->getSubSubject();
+        $this->mail->isHTML(true);
+        $this->mail->msgHTML($this->buildMessage());
+    }
+
+    protected function getSubSubject(): string
+    {
+        return gettext('Happy Birthday') . ', ' . $this->person->getFullName() . '!';
+    }
+
+    public function getTokens(): array
+    {
+        $ageString = $this->person->getAge();
+        $age = ($ageString !== null && ctype_digit($ageString)) ? (int) $ageString : null;
+
+        $body = gettext('Happy Birthday') . ', ' . $this->person->getFullName() . '!';
+        $body .= "\n\n";
+        if ($age !== null) {
+            $body .= sprintf(gettext('Wishing you a wonderful %d%s birthday!'), $age, $this->getOrdinalSuffix($age));
+        } else {
+            $body .= gettext('Wishing you a wonderful birthday!');
+        }
+        $body .= "\n\n" . SystemConfig::getValue('sChurchName') . ' ' . gettext('is thinking of you today.');
+
+        $myTokens = [
+            'toName' => $this->person->getFullName(),
+            'body'   => $body,
+        ];
+
+        return array_merge($this->getCommonTokens(), $myTokens);
+    }
+
+    private function getOrdinalSuffix(int $number): string
+    {
+        if ($number % 100 >= 11 && $number % 100 <= 13) {
+            return 'th';
+        }
+
+        switch ($number % 10) {
+            case 1:
+                return 'st';
+            case 2:
+                return 'nd';
+            case 3:
+                return 'rd';
+            default:
+                return 'th';
+        }
+    }
+
+    protected function getFullURL(): string
+    {
+        return '';
+    }
+
+    protected function getButtonText(): string
+    {
+        return '';
+    }
+
+    protected function getPreheader(): string
+    {
+        return $this->getSubSubject();
+    }
+}
\ No newline at end of file
diff --git a/src/ChurchCRM/Service/BirthdayEmailService.php b/src/ChurchCRM/Service/BirthdayEmailService.php
new file mode 100644
index 0000000000..615960a76b
--- /dev/null
+++ b/src/ChurchCRM/Service/BirthdayEmailService.php
@@ -0,0 +1,68 @@
+<?php
+
+namespace ChurchCRM\Service;
+
+use ChurchCRM\dto\SystemConfig;
+use ChurchCRM\Emails\notifications\BirthdayEmail;
+use ChurchCRM\model\ChurchCRM\PersonQuery;
+use ChurchCRM\Utils\DateTimeUtils;
+use ChurchCRM\Utils\LoggerUtils;
+
+class BirthdayEmailService
+{
+    /**
+     * Sends birthday greeting emails to everyone whose birthday is today,
+     * if the feature is enabled and it has not already run today.
+     *
+     * Safe to call multiple times per day (idempotent) and safe to call
+     * even when the feature is disabled (no-ops immediately).
+     */
+    public static function run(): void
+    {
+        if (!SystemConfig::getBooleanValue('bEnableBirthdayEmails')) {
+            return;
+        }
+
+        $tz = DateTimeUtils::getConfiguredTimezone();
+        $today = new \DateTime('now', $tz);
+        $todayString = $today->format('Y-m-d');
+
+        if (SystemConfig::getValue('sLastBirthdayEmailRunDate') === $todayString) {
+            // Already ran today; avoid duplicate sends.
+            return;
+        }
+
+        // Persist before sending so a crash cannot result in duplicate emails.
+        SystemConfig::setValue('sLastBirthdayEmailRunDate', $todayString);
+
+        $logger = LoggerUtils::getAppLogger();
+        $sentCount = 0;
+        $skippedCount = 0;
+
+        $people = PersonQuery::create()
+            ->filterByBirthMonth((int) $today->format('n'))
+            ->filterByBirthDay((int) $today->format('j'))
+            ->find();
+
+        foreach ($people as $person) {
+            $email = $person->getEmail();
+            if (empty($email)) {
+                $skippedCount++;
+                continue;
+            }
+
+            try {
+                $birthdayEmail = new BirthdayEmail([$email], $person);
+                if ($birthdayEmail->send()) {
+                    $sentCount++;
+                } else {
+                    $logger?->warning('BirthdayEmailService: failed to send to person ID ' . $person->getId() . ': ' . $birthdayEmail->getError());
+                }
+            } catch (\Exception $e) {
+                $logger?->warning('BirthdayEmailService: exception sending to person ID ' . $person->getId() . ': ' . $e->getMessage());
+            }
+        }
+
+        $logger?->info("BirthdayEmailService: sent {$sentCount} birthday email(s), skipped {$skippedCount} (no email on file)");
+    }
+}
diff --git a/src/ChurchCRM/Service/SystemService.php b/src/ChurchCRM/Service/SystemService.php
index 70b79d14f5..9f4f9b9674 100644
--- a/src/ChurchCRM/Service/SystemService.php
+++ b/src/ChurchCRM/Service/SystemService.php
@@ -75,6 +75,8 @@ public static function runTimerJobs(): void
     {
         LoggerUtils::getAppLogger()->debug('Starting background job processing');
 
+        BirthdayEmailService::run();
+
         // Fire the CRON_RUN hook so plugins can register scheduled tasks.
         // Each active plugin registers a handler on Hooks::CRON_RUN in boot().
         // HookManager catches and logs any per-plugin errors so one failing
diff --git a/src/ChurchCRM/dto/SystemConfig.php b/src/ChurchCRM/dto/SystemConfig.php
index 253d12ad4c..33d93edd95 100644
--- a/src/ChurchCRM/dto/SystemConfig.php
+++ b/src/ChurchCRM/dto/SystemConfig.php
@@ -259,6 +259,8 @@ private static function buildConfigs(): array
             'bEnabledEvents'                       => new ConfigItem('bEnabledEvents', 'boolean', '1', gettext('Show or hide the Events section in the main navigation menu')),
             'bEnabledFundraiser'                   => new ConfigItem('bEnabledFundraiser', 'boolean', '1', gettext('Enable Fundraiser menu.')),
             'bEnabledEmail'                        => new ConfigItem('bEnabledEmail', 'boolean', '1', gettext('Enable email sending from ChurchCRM. Required for password reset, notifications, and email links.')),
+            'bEnableBirthdayEmails'                => new ConfigItem('bEnableBirthdayEmails', 'boolean', '0', gettext('Automatically send a birthday greeting email to people on their birthday')),
+            'sLastBirthdayEmailRunDate'            => new ConfigItem('sLastBirthdayEmailRunDate', 'text', '', gettext('Internal: last date birthday emails were sent (YYYY-MM-DD). Do not edit manually.')),
             'sEmailPreheader'                      => new ConfigItem('sEmailPreheader', 'text', '', gettext('Optional short summary shown as inbox preview text beside the subject line. Leave blank to let the email client auto-generate from the body. Per-email types (password reset, new member, verification) set their own preheader; this is a fallback.')),
             'sGreeterCustomMsg1'                   => new ConfigItem('sGreeterCustomMsg1', 'text', '', gettext('Custom message for church greeter email 1, max 255 characters')),
             'sGreeterCustomMsg2'                   => new ConfigItem('sGreeterCustomMsg2', 'text', '', gettext('Custom message for church greeter email 2, max 255 characters')),
@@ -283,7 +285,7 @@ private static function buildConfigs(): array
     private static function buildCategories(): array
     {
         return [
-            gettext('New Members & Greeting') => ['sNewPersonNotificationRecipientIDs', 'IncludeDataInNewPersonNotifications', 'sGreeterCustomMsg1', 'sGreeterCustomMsg2'],
+            gettext('New Members & Greeting') => ['sNewPersonNotificationRecipientIDs', 'IncludeDataInNewPersonNotifications', 'sGreeterCustomMsg1', 'sGreeterCustomMsg2', 'bEnableBirthdayEmails'],
             gettext('People')              => ['sDirClassifications', 'iPersonNameStyle', 'iPersonInitialStyle', 'bHidePersonAddress', 'bHideFriendDate', 'bHideWeddingDate', 'bForceUppercaseZip', 'sInactiveClassification'],
             gettext('Families')            => ['sDirRoleHead', 'sDirRoleSpouse', 'sDirRoleChild', 'sDefaultCity', 'sDefaultState', 'sDefaultZip', 'sDefaultCountry', 'bHideFamilyNewsletter'],
             gettext('Financial Settings') => ['bEnabledFinance', 'bEnabledFundraiser', 'sDepositSlipType', 'iChecksPerDepositForm', 'bDisplayBillCounts', 'bUseScannedChecks', 'bEnableNonDeductible', 'iFYMonth', 'bUseDonationEnvelopes', 'aFinanceQueries', 'sCurrencySymbol', 'sCurrencyPosition', 'sThousandsSeparator', 'sDecimalSeparator'],
diff --git a/src/SystemSettings.php b/src/SystemSettings.php
index 30b8ede214..55785470e2 100644
--- a/src/SystemSettings.php
+++ b/src/SystemSettings.php
@@ -119,6 +119,7 @@ function categoryId(string $category): string {
   </div>
 </div>
 
+
 <form name="SystemSettingsForm" method="post" action="SystemSettings.php">
 <div class="row g-4">
 
@@ -214,11 +215,19 @@ function categoryId(string $category): string {
                   <?php elseif ($setting->getType() === 'number' || $setting->getType() === 'date') : ?>
                     <input type="text" maxlength="15" class="form-control" name="new_value[<?= $setting->getName() ?>]" value="<?= InputUtils::escapeAttribute($setting->getValue()) ?>">
 
-                  <?php elseif ($setting->getType() === 'boolean') : ?>
+                    <?php elseif ($setting->getType() === 'boolean') : ?>
                     <select name="new_value[<?= $setting->getName() ?>]" class="form-select choiceSelectBox">
                       <option value="0" <?= !$setting->getValue() ? 'selected' : '' ?>><?= gettext('False') ?></option>
                       <option value="1" <?= $setting->getValue() ? 'selected' : '' ?>><?= gettext('True') ?></option>
                     </select>
+                    <?php if ($setting->getName() === 'bEnableBirthdayEmails') : ?>
+                      <div class="mt-2">
+                        <button type="button" class="btn btn-outline-primary btn-sm" id="sendTestBirthdayEmail">
+                          <i class="fa-solid fa-paper-plane me-1"></i><?= gettext('Send Test Birthday Email to Myself') ?>
+                        </button>
+                        <span id="birthdayEmailTestResult" class="ms-2 small"></span>
+                      </div>
+                    <?php endif; ?>
 
                   <?php elseif ($setting->getType() === 'json') : ?>
                     <input type="hidden" name="new_value[<?= $setting->getName() ?>]" value="<?= InputUtils::escapeAttribute($setting->getValue()) ?>">
diff --git a/src/admin/index.php b/src/admin/index.php
index fda62faf17..f6ad177479 100644
--- a/src/admin/index.php
+++ b/src/admin/index.php
@@ -16,6 +16,7 @@
 require __DIR__ . '/routes/get-started.php';
 require __DIR__ . '/routes/api/demo.php';
 require __DIR__ . '/routes/api/database.php';
+require __DIR__ . '/routes/api/birthday-emails.php';
 require __DIR__ . '/routes/api/orphaned-files.php';
 require __DIR__ . '/routes/api/options.php';
 require __DIR__ . '/routes/api/system/system-config.php';
diff --git a/src/admin/routes/api/birthday-emails.php b/src/admin/routes/api/birthday-emails.php
new file mode 100644
index 0000000000..d06419d5fc
--- /dev/null
+++ b/src/admin/routes/api/birthday-emails.php
@@ -0,0 +1,46 @@
+<?php
+
+use ChurchCRM\Authentication\AuthenticationManager;
+use ChurchCRM\Emails\notifications\BirthdayEmail;
+use ChurchCRM\Slim\SlimUtils;
+use Psr\Http\Message\ResponseInterface as Response;
+use Psr\Http\Message\ServerRequestInterface as Request;
+use Slim\Routing\RouteCollectorProxy;
+
+$app->group('/api/admin/birthday-emails', function (RouteCollectorProxy $group): void {
+
+    /**
+     * @OA\Post(
+     *     path="/api/admin/birthday-emails/test",
+     *     summary="Send a test birthday email to the current admin (Admin role required)",
+     *     tags={"Admin"},
+     *     security={{"ApiKeyAuth":{}}},
+     *     @OA\Response(response=200, description="Test email sent"),
+     *     @OA\Response(response=400, description="Current admin has no email on file"),
+     *     @OA\Response(response=500, description="Test email failed to send")
+     * )
+     */
+    $group->post('/test', function (Request $request, Response $response, array $args): Response {
+        $person = AuthenticationManager::getCurrentUser()->getPerson();
+        $email = $person->getEmail();
+
+        if (empty($email)) {
+            return SlimUtils::renderErrorJSON($response, gettext('Your account has no email address on file. Add one to your profile to send a test.'), [], 400);
+        }
+
+        try {
+            $birthdayEmail = new BirthdayEmail([$email], $person);
+            if ($birthdayEmail->send()) {
+                return SlimUtils::renderJSON($response, [
+                    'success' => true,
+                    'message' => gettext('Test email sent to') . ' ' . $email,
+                ]);
+            }
+
+            return SlimUtils::renderErrorJSON($response, gettext('Test email failed to send') . ': ' . $birthdayEmail->getError(), [], 500);
+        } catch (\Throwable $e) {
+            return SlimUtils::renderErrorJSON($response, gettext('Test email failed to send'), [], 500, $e, $request);
+        }
+    });
+
+});
\ No newline at end of file
diff --git a/src/skin/js/SystemSettings.js b/src/skin/js/SystemSettings.js
index 343312f061..ac97bdab85 100644
--- a/src/skin/js/SystemSettings.js
+++ b/src/skin/js/SystemSettings.js
@@ -70,3 +70,28 @@ $(".setting-tip").click(function () {
     className: "setting-tip-box",
   });
 });
+
+$("#sendTestBirthdayEmail").on("click", function (event) {
+  event.preventDefault();
+  var $btn = $(this);
+  var $result = $("#birthdayEmailTestResult");
+
+  $btn.prop("disabled", true);
+  $result.removeClass("text-success text-danger").text("Sending...");
+
+  $.ajax({
+    method: "POST",
+    url: window.CRM.root + "/admin/api/admin/birthday-emails/test",
+    dataType: "json",
+  })
+    .done(function (data) {
+      $result.addClass("text-success").text(data.message);
+    })
+    .fail(function (jqXHR) {
+      var msg = (jqXHR.responseJSON && jqXHR.responseJSON.message) || "Failed to send test email.";
+      $result.addClass("text-danger").text(msg);
+    })
+    .always(function () {
+      $btn.prop("disabled", false);
+    });
+});