diff --git a/config/config.default.php b/config/config.default.php
index 55982230..1896fbb0 100644
--- a/config/config.default.php
+++ b/config/config.default.php
@@ -350,6 +350,12 @@ return [
         '4XL'  => '4XLarge Straight-Cut',
     ],
 
+    // Whether to show the current day of the event (-2, -1, 0, 1, 2…) in footer and on the dashboard.
+    // The event start date has to be set for it to appear.
+    'enable_show_day_of_event' => false,
+    // If true there will be a day 0 (-1, 0, 1…). If false there won't (-1, 1…)
+    'event_has_day0' => true,
+
     'metrics'                 => [
         // User work buckets in seconds
         'work'    => [1 * 60 * 60, 1.5 * 60 * 60, 2 * 60 * 60, 3 * 60 * 60, 5 * 60 * 60, 10 * 60 * 60, 20 * 60 * 60],
diff --git a/includes/view/PublicDashboard_view.php b/includes/view/PublicDashboard_view.php
index 29837176..a39946bf 100644
--- a/includes/view/PublicDashboard_view.php
+++ b/includes/view/PublicDashboard_view.php
@@ -1,5 +1,6 @@
 <?php
 
+use Engelsystem\Helpers\DayOfEvent;
 use Engelsystem\Models\News;
 use Illuminate\Support\Collection;
 
@@ -43,17 +44,25 @@ function public_dashboard_view($stats, $free_shifts, $important_news)
         ]);
     }
 
+    $stats =  [
+        stats(__('Angels needed in the next 3 hrs'), $stats['needed-3-hours']),
+        stats(__('Angels needed for nightshifts'), $stats['needed-night']),
+        stats(__('Angels currently working'), $stats['angels-working'], 'default'),
+        stats(__('Hours to be worked'), $stats['hours-to-work'], 'default'),
+    ];
+
+    $dayOfEvent = DayOfEvent::get();
+
+    if (config('enable_show_day_of_event') && $dayOfEvent !== null) {
+        $stats[] = stats(__('dashboard.day'), $dayOfEvent, 'default');
+    }
+
     $isFiltered = request()->get('filtered');
     $filter = collect(session()->get('shifts-filter'))->only(['rooms', 'types'])->toArray();
     return page([
         div('wrapper', [
             div('public-dashboard', [
-                div('first row', [
-                    stats(__('Angels needed in the next 3 hrs'), $stats['needed-3-hours']),
-                    stats(__('Angels needed for nightshifts'), $stats['needed-night']),
-                    stats(__('Angels currently working'), $stats['angels-working'], 'default'),
-                    stats(__('Hours to be worked'), $stats['hours-to-work'], 'default'),
-                ], 'statistics'),
+                div('first row', $stats, 'statistics'),
                 $news,
                 $needed_angels,
             ], 'public-dashboard'),
diff --git a/resources/lang/de_DE/default.po b/resources/lang/de_DE/default.po
index 4013dbcc..fb6cffa4 100644
--- a/resources/lang/de_DE/default.po
+++ b/resources/lang/de_DE/default.po
@@ -2426,3 +2426,9 @@ msgstr "Raum erstellen"
 
 msgid "room.edit.title"
 msgstr "Raum bearbeiten"
+
+msgid "event.day"
+msgstr "Tag %1$d"
+
+msgid "dashboard.day"
+msgstr "Tag"
diff --git a/resources/lang/en_US/default.po b/resources/lang/en_US/default.po
index 342e1110..4569cd7f 100644
--- a/resources/lang/en_US/default.po
+++ b/resources/lang/en_US/default.po
@@ -524,3 +524,9 @@ msgstr "Create room"
 
 msgid "room.edit.title"
 msgstr "Edit room"
+
+msgid "event.day"
+msgstr "Day %1$d"
+
+msgid "dashboard.day"
+msgstr "Day"
diff --git a/resources/views/layouts/parts/footer.twig b/resources/views/layouts/parts/footer.twig
index 9c2a95cc..571266e4 100644
--- a/resources/views/layouts/parts/footer.twig
+++ b/resources/views/layouts/parts/footer.twig
@@ -11,11 +11,17 @@
                         config('event_start').format(__('Y-m-d')),
                         config('event_end').format(__('Y-m-d'))
                     ]) }}
+                    {%- if config('enable_show_day_of_event') and day_of_event is defined -%}
+                        , {{ __('event.day', [day_of_event]) }}
+                    {% endif %}
                 {% elseif config('event_start') %}
                     {{ __('%1$s, starting %2$s', [
                         config('name'),
                         config('event_start').format(__('Y-m-d'))
                     ]) }}
+                    {%- if config('enable_show_day_of_event') and day_of_event is defined -%}
+                        , {{ __('event.day', [day_of_event]) }}
+                    {% endif %}
                 {% else %}
                     {{ config('name') }}
                 {% endif %} <br>
@@ -23,7 +29,10 @@
                 {{ __('Event from %1$s to %2$s', [
                     config('event_start').format(__('Y-m-d')),
                     config('event_end').format(__('Y-m-d'))
-                ]) }} <br>
+                ]) }}
+                {%- if config('enable_show_day_of_event') and day_of_event is defined -%}
+                    , {{ __('event.day', [day_of_event]) }}
+                {% endif %} <br>
             {% endif %}
         {% endblock %}
 
diff --git a/src/Helpers/DayOfEvent.php b/src/Helpers/DayOfEvent.php
new file mode 100644
index 00000000..48776385
--- /dev/null
+++ b/src/Helpers/DayOfEvent.php
@@ -0,0 +1,52 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Engelsystem\Helpers;
+
+use Engelsystem\Helpers\Carbon;
+
+class DayOfEvent
+{
+    /**
+     * @return The current day of the event.
+     *         If "event_has_day0" is set to true in config,
+     *         the first day of the event will be 0, else 1.
+     *         Returns null if "event_start" is not set.
+     */
+    public static function get(): int | null
+    {
+        $startOfEvent = config('event_start');
+
+        if (!$startOfEvent) {
+            return null;
+        }
+
+        /** @var Carbon $startOfEvent */
+        $startOfEvent = $startOfEvent->copy()->startOfDay();
+
+        $now = Carbon::now()->startOfDay();
+        $diff = $startOfEvent->diffInDays($now, false);
+
+        if ($diff >= 0) {
+            // The first day of the event (diff 0) should be 1.
+            // The seconds day of the event (diff 1) should be 2.
+            // Add one day to the diff.
+            return $diff + 1;
+        }
+
+        if (config('event_has_day0') && $diff < 0) {
+            // One day before the event (-1 diff) should day 0.
+            // Two days before the event (-2 diff) should be -1.
+            // Add one day to the diff.
+            return $diff + 1;
+        }
+
+
+        // This is the remaining case where the diff is negative (before event).
+        // One day before the event (-1 diff) should be day -1.
+        // Two days before the event (-2 diff) should be day -2.
+        // Return as it is.
+        return $diff;
+    }
+}
diff --git a/src/Renderer/Twig/Extensions/Globals.php b/src/Renderer/Twig/Extensions/Globals.php
index a6c58183..fb7c9a8a 100644
--- a/src/Renderer/Twig/Extensions/Globals.php
+++ b/src/Renderer/Twig/Extensions/Globals.php
@@ -5,6 +5,7 @@ declare(strict_types=1);
 namespace Engelsystem\Renderer\Twig\Extensions;
 
 use Engelsystem\Helpers\Authenticator;
+use Engelsystem\Helpers\DayOfEvent;
 use Engelsystem\Http\Request;
 use Twig\Extension\AbstractExtension as TwigExtension;
 use Twig\Extension\GlobalsInterface as GlobalsInterface;
@@ -53,6 +54,7 @@ class Globals extends TwigExtension implements GlobalsInterface
             'request'       => $this->request,
             'themeId'       => $themeId,
             'theme'         => $theme,
+            'day_of_event'  => DayOfEvent::get(),
         ];
     }
 }
diff --git a/tests/Unit/Helpers/DayOfEventTest.php b/tests/Unit/Helpers/DayOfEventTest.php
new file mode 100644
index 00000000..ad13bcd6
--- /dev/null
+++ b/tests/Unit/Helpers/DayOfEventTest.php
@@ -0,0 +1,68 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Engelsystem\Test\Unit\Helpers;
+
+use Engelsystem\Config\Config;
+use Engelsystem\Helpers\Carbon;
+use Engelsystem\Helpers\DayOfEvent;
+use Engelsystem\Test\Unit\ServiceProviderTest;
+
+class DayOfEventTest extends ServiceProviderTest
+{
+    private const FORMAT = 'Y-m-d H:i:s';
+    private Config $config;
+
+    public function setUp(): void
+    {
+        $app = $this->createAndSetUpAppWithConfig([]);
+        $this->config = $app->get('config');
+    }
+
+    public function tearDown(): void
+    {
+        Carbon::setTestNow();
+    }
+
+    /**
+     * @return Array<string, array>
+     */
+    public function provideTestGetData(): array
+    {
+        return [
+            'day -2 (10:00, with day 0)' => [-2, true, '2023-07-31 15:23:42', '2023-07-28 10:00:00'],
+            'day -2 (23:59, with day 0)' => [-2, true, '2023-07-31 15:23:42', '2023-07-28 23:59:59'],
+            'day -1 (23:59, with day 0)' => [-1, true, '2023-07-31 15:23:42', '2023-07-29 23:59:59'],
+            'day 0 (with day 0)'         => [0, true, '2023-07-31 15:23:42', '2023-07-30 16:00:00'],
+            'day 1 (with day 0)'         => [1, true, '2023-07-31 15:23:42', '2023-07-31 10:00:00'],
+            'day 2 (with day 0)'         => [2, true, '2023-07-31 15:23:42', '2023-08-01 10:00:00'],
+
+            'day -2 (without day 0)' => [-2, false, '2023-07-31 15:23:42', '2023-07-29 10:00:00'],
+            'day -1 (without day 0)' => [-1, false, '2023-07-31 15:23:42', '2023-07-30 23:59:59'],
+            'day 1 (without day 0)'  => [1, false, '2023-07-31 15:23:42', '2023-07-31 00:00:00'],
+            'day 2 (without day 0)'  => [2, false, '2023-07-31 15:23:42', '2023-08-01 16:00:00'],
+
+            'no start date' => [null, false, null, '2023-08-01 16:00:00'],
+        ];
+    }
+
+    /**
+     * @dataProvider provideTestGetData
+     * @covers \Engelsystem\Helpers\DayOfEvent
+     */
+    public function testGet(
+        int | null $expected,
+        bool $eventHasDay0,
+        string | null $eventStart,
+        string $now
+    ): void {
+        $this->config->set(
+            'event_start',
+            $eventStart ? Carbon::createFromFormat(self::FORMAT, $eventStart) : null
+        );
+        $this->config->set('event_has_day0', $eventHasDay0);
+        Carbon::setTestNow(Carbon::createFromFormat(self::FORMAT, $now));
+        $this->assertSame($expected, DayOfEvent::get());
+    }
+}
diff --git a/tests/Unit/Renderer/Twig/Extensions/GlobalsTest.php b/tests/Unit/Renderer/Twig/Extensions/GlobalsTest.php
index 4076ac4c..c4fbee70 100644
--- a/tests/Unit/Renderer/Twig/Extensions/GlobalsTest.php
+++ b/tests/Unit/Renderer/Twig/Extensions/GlobalsTest.php
@@ -6,6 +6,7 @@ namespace Engelsystem\Test\Unit\Renderer\Twig\Extensions;
 
 use Engelsystem\Config\Config;
 use Engelsystem\Helpers\Authenticator;
+use Engelsystem\Helpers\Carbon;
 use Engelsystem\Http\Request;
 use Engelsystem\Models\User\Settings;
 use Engelsystem\Models\User\User;
@@ -17,6 +18,16 @@ class GlobalsTest extends ExtensionTest
 {
     use HasDatabase;
 
+    public static function setUpBeforeClass(): void
+    {
+        Carbon::setTestNow(Carbon::createFromFormat('Y-m-d', '2023-08-15'));
+    }
+
+    public static function tearDownAfterClass(): void
+    {
+        Carbon::setTestNow();
+    }
+
     /**
      * @covers \Engelsystem\Renderer\Twig\Extensions\Globals::__construct
      * @covers \Engelsystem\Renderer\Twig\Extensions\Globals::getGlobals
@@ -35,7 +46,17 @@ class GlobalsTest extends ExtensionTest
         $user = User::factory()
             ->has(Settings::factory(['theme' => 42]))
             ->create();
-        $config = new Config(['theme' => 23, 'themes' => [42 => $theme, 23 => $theme2, 1337 => $theme3]]);
+        $config = new Config(
+            [
+                'event_start' => Carbon::createFromFormat('Y-m-d', '2023-08-13'),
+                'theme'  => 23,
+                'themes' => [
+                    42   => $theme,
+                    23   => $theme2,
+                    1337 => $theme3,
+                ],
+            ]
+        );
 
         $auth->expects($this->exactly(4))
             ->method('user')
@@ -49,9 +70,11 @@ class GlobalsTest extends ExtensionTest
         $this->app->instance('config', $config);
 
         $extension = new Globals($auth, $request);
+        $globals = $extension->getGlobals();
+
+        $this->assertGlobalsExists('day_of_event', -2, $globals);
 
         // No user
-        $globals = $extension->getGlobals();
         $this->assertGlobalsExists('user', [], $globals);
         $this->assertGlobalsExists('user_messages', null, $globals);
         $this->assertGlobalsExists('request', $request, $globals);