diff --git a/.gitmodules b/.gitmodules
index 95eae8109..89f2ad924 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -52,3 +52,6 @@
 [submodule "libadrenotools"]
 	path = externals/libadrenotools
 	url = https://github.com/bylaws/libadrenotools
+[submodule "tzdb_to_nx"]
+	path = externals/nx_tzdb/tzdb_to_nx
+	url = https://github.com/lat9nq/tzdb_to_nx.git
diff --git a/externals/nx_tzdb/tzdb_to_nx b/externals/nx_tzdb/tzdb_to_nx
new file mode 160000
index 000000000..34df65eff
--- /dev/null
+++ b/externals/nx_tzdb/tzdb_to_nx
@@ -0,0 +1 @@
+Subproject commit 34df65eff295c2bd9ee9e6a077d662486d5cabb3