From 937c4296f7c006431c429959e87e1983eed2ce3f Mon Sep 17 00:00:00 2001
From: Aric Camarata <aric.camarata@gmail.com>
Date: Sun, 8 Mar 2026 16:46:28 -0400
Subject: [PATCH] docs: add Acknowledgments section to README

---
 README.md | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/README.md b/README.md
index ec87265..ad3f4e2 100644
--- a/README.md
+++ b/README.md
@@ -194,6 +194,12 @@ Full reference, architecture notes, and algorithmic detail in the [wiki](https:/
 
 ---
 
+## Acknowledgments
+
+Calendar data and algorithms provided by [hijri-core](https://github.com/acamarata/hijri-core). The Umm al-Qura table is derived from data published by the King Abdulaziz City for Science and Technology (KACST). FCNA new moon calculations follow Jean Meeus, "Astronomical Algorithms," 2nd ed., Chapter 49.
+
+---
+
 ## License
 
 MIT. Copyright (c) 2026 Aric Camarata. See [LICENSE](LICENSE).