From ffb876afa67403377241aaff24dbaf6d816d7647 Mon Sep 17 00:00:00 2001
From: Howard Hinnant <howard.hinnant@gmail.com>
Date: Fri, 17 Jun 2016 20:39:07 -0400
Subject: [PATCH] Fix bug in format

---
 tz.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tz.h b/tz.h
index c6cc742..17c15ec 100644
--- a/tz.h
+++ b/tz.h
@@ -1408,7 +1408,7 @@ format(const std::locale& loc, std::basic_string<CharT, Traits> format,
                 else
                 {
                     auto info = zone->get_info(tp).first;
-                    format.replace(i, 2, std::basic_string<CharT, Traits>
+                    format.replace(i - 1, 2, std::basic_string<CharT, Traits>
                                             (info.abbrev.begin(), info.abbrev.end()));
                     i += info.abbrev.size() - 1;
                 }