diff --git a/packages.json b/packages.json
index 2e96268..59d75e6 100644
--- a/packages.json
+++ b/packages.json
@@ -6666,5 +6666,17 @@
     "description": "NiGui is a cross-platform, desktop GUI toolkit using native widgets.",
     "license": "MIT",
     "web": "https://github.com/trustable-code/NiGui"
+  },
+  {
+    "name": "nimcalcal",
+    "url": "https://github.com/skilchen/nimcalcal",
+    "method": "git",
+    "tags": [
+      "calendar",
+      "library"
+    ],
+    "description": "nimcalcal - PyCalCal translated to Nim, Calendrical Calculations from Reingold/Dershowitz",
+    "license": "MIT",
+    "web": "http://www3.cs.stonybrook.edu/~algorith/implement/reingold/implement.shtml"
   }
 ]