From dd6722fe13144ed7981079ac4271e576c73acb63 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Dominik=20Pant=C5=AF=C4=8Dek?=
 <dominik.pantucek@trustica.cz>
Date: Wed, 22 Mar 2023 22:42:08 +0100
Subject: [PATCH] Finish month module documentation.

---
 README.md | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/README.md b/README.md
index 462f3a4..74e69be 100644
--- a/README.md
+++ b/README.md
@@ -172,9 +172,22 @@ after ```n``` in the calendar or they are ```equal?```.
 Returns ```#t``` if both month values are valud and ```m``` comes
 after ```n``` in the calendar.
 
-month-diff
+    (month-diff f t)
 
-month-add
+* ```f``` - valid month (from)
+* ```t``` - valid month (to)
+
+Returns the difference in months from month ```f``` to month
+```t```. If both months are the same, the result is zero. If ```t```
+is before ```f```, the result is negative.
+
+    (month-add m n)
+
+* ```m``` - valid month
+* ```n``` - an integer
+
+Returns a new valid month that comes ```n``` months after ```m```. If
+```n``` is negative, it correctly subtracts the months.
 
 ### Period