From 9bebea8225cc022dbdb7f755243399023c5db725 Mon Sep 17 00:00:00 2001
From: Sami Samhuri <sami@samhuri.net>
Date: Thu, 2 Jan 2020 18:34:29 -0800
Subject: [PATCH] Fix an off-by-one error

---
 samhuri.net/Sources/samhuri.net/Posts/Model/Month.swift | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/samhuri.net/Sources/samhuri.net/Posts/Model/Month.swift b/samhuri.net/Sources/samhuri.net/Posts/Model/Month.swift
index 2820d9f..917b199 100644
--- a/samhuri.net/Sources/samhuri.net/Posts/Model/Month.swift
+++ b/samhuri.net/Sources/samhuri.net/Posts/Model/Month.swift
@@ -19,7 +19,7 @@ struct Month: Equatable {
     let number: Int
 
     init?(_ number: Int) {
-        guard number < Month.all.count else {
+        guard (1 ... Month.all.count).contains(number) else {
             return nil
         }
         self.number = number