diff --git a/changelog.md b/changelog.md
index 8cdcdf9d..7b1d4ae8 100644
--- a/changelog.md
+++ b/changelog.md
@@ -2,6 +2,8 @@
 
 This further refines Microsoft account support, along with small fixes related to modpack platforms and Java runtime detection.
 
+It's also been 10 years since the first release of MultiMC. All background cats are now ready to party!
+
 ### Microsoft accounts
 
 The account system now refreshes accounts in the background while the application is running.
diff --git a/launcher/resources/backgrounds/backgrounds.qrc b/launcher/resources/backgrounds/backgrounds.qrc
index 83505635..52921512 100644
--- a/launcher/resources/backgrounds/backgrounds.qrc
+++ b/launcher/resources/backgrounds/backgrounds.qrc
@@ -3,5 +3,6 @@
     <qresource prefix="/backgrounds">
         <file alias="kitteh">catbgrnd2.png</file>
         <file alias="catmas">catmas.png</file>
+        <file alias="cattiversary">cattiversary.png</file>
     </qresource>
 </RCC>
diff --git a/launcher/resources/backgrounds/cattiversary.png b/launcher/resources/backgrounds/cattiversary.png
new file mode 100644
index 00000000..09a36566
Binary files /dev/null and b/launcher/resources/backgrounds/cattiversary.png differ
diff --git a/launcher/resources/sources/burfcat_hat.png b/launcher/resources/sources/burfcat_hat.png
new file mode 100644
index 00000000..a378c1fb
Binary files /dev/null and b/launcher/resources/sources/burfcat_hat.png differ
diff --git a/launcher/ui/MainWindow.cpp b/launcher/ui/MainWindow.cpp
index 95d9ae5d..ac539fdc 100644
--- a/launcher/ui/MainWindow.cpp
+++ b/launcher/ui/MainWindow.cpp
@@ -1322,8 +1322,18 @@ void MainWindow::setCatBackground(bool enabled)
     if (enabled)
     {
         QDateTime now = QDateTime::currentDateTime();
+        QDateTime birthday(QDate(now.date().year(), 11, 30), QTime(0, 0));
         QDateTime xmas(QDate(now.date().year(), 12, 25), QTime(0, 0));
-        QString cat = (non_stupid_abs(now.daysTo(xmas)) <= 4) ? "catmas" : "kitteh";
+        QString cat;
+        if(non_stupid_abs(now.daysTo(xmas)) <= 4) {
+            cat = "catmas";
+        }
+        else if (non_stupid_abs(now.daysTo(birthday)) <= 12) {
+            cat = "cattiversary";
+        }
+        else {
+            cat = "kitteh";
+        }
         view->setStyleSheet(QString(R"(
 InstanceView
 {