From ab37c362e35267d6dee02cb47760f9e9c669d3be Mon Sep 17 00:00:00 2001
From: Howard Hinnant <howard.hinnant@gmail.com>
Date: Mon, 11 Dec 2023 21:33:25 -0500
Subject: [PATCH] Count sign as part of the character count.

---
 include/date/date.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/include/date/date.h b/include/date/date.h
index cbfbc98..959cd5c 100644
--- a/include/date/date.h
+++ b/include/date/date.h
@@ -6351,7 +6351,10 @@ read_signed(std::basic_istream<CharT, Traits>& is, unsigned m = 1, unsigned M =
         if (('0' <= c && c <= '9') || c == '-' || c == '+')
         {
             if (c == '-' || c == '+')
+            {
                 (void)is.get();
+                --M;
+            }
             auto x = static_cast<int>(read_unsigned(is, std::max(m, 1u), M));
             if (!is.fail())
             {