From bd6d9795bf8b21693e61fd360bbb86969abed848 Mon Sep 17 00:00:00 2001
From: Maximilian Pfundstein <maximilian@pfundstein.org>
Date: Fri, 4 Oct 2024 21:40:01 +0200
Subject: [PATCH] fix: calculate personnummer correctly before annual birthday

---
 Personnummer/Personnummer.cs | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/Personnummer/Personnummer.cs b/Personnummer/Personnummer.cs
index af4689c..06dc544 100644
--- a/Personnummer/Personnummer.cs
+++ b/Personnummer/Personnummer.cs
@@ -24,7 +24,21 @@ public Options()
 
         public DateTime Date { get; private set; }
 
-        public int Age => DateTime.Now.Year - Date.Year;
+        public int Age
+        {
+            get
+            {
+                var now = DateTime.Now;
+                var age = now.Year - Date.Year;
+
+                if (now.Month >= Date.Month && now.Day > Date.Day)
+                {
+                    age--;
+                }
+
+                return age;
+            }
+        }
 
         public string Separator => Age >= 100 ? "+" : "-";