diff --git a/.gitmodules b/.gitmodules
index e70d41ee..8943d1d5 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,6 @@
 [submodule "platform"]
 	path = platform
-url=https://repo.palemoon.org/MoonchildProductions/UXP.git
\ No newline at end of file
+url=https://repo.palemoon.org/MoonchildProductions/UXP.git
+[submodule "calendar"]
+	path = calendar
+	url = https://repo.palemoon.org/binaryoutcast/calendar.git
diff --git a/calendar b/calendar
new file mode 160000
index 00000000..91bb5015
--- /dev/null
+++ b/calendar
@@ -0,0 +1 @@
+Subproject commit 91bb5015382f71033bf83b8635ba2e3bb64da74b