diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 45148de8ac3e..ec15c4540a72 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -3446,6 +3446,26 @@ let
     };
   };
 
+  jdcal = buildPythonPackage rec {
+    version = "1.0";
+    name = "jdcal-${version}";
+
+    src = pkgs.fetchFromGitHub {
+      owner = "phn";
+      repo = "jdcal";
+      rev = "v${version}";
+      sha256 = "0jjgrrylraqzk3n97hay4gj00ky6vlvkfaapfgqlbcxyq30j24vq";
+    };
+
+    meta = {
+      description = "A module containing functions for converting between Julian dates and calendar dates";
+      homepage = "https://github.com/phn/jdcal";
+      license = licenses.bsd2;
+      maintainers = with maintainers; [ lihop ];
+      platforms = platforms.all;
+    };
+  };
+
   jsonwatch = buildPythonPackage rec {
     name = "jsonwatch-0.2.0";