From dd47e66832fb345d4e05a291dfbe5f8e3c7b8f2f Mon Sep 17 00:00:00 2001
From: Tim Stack <timothyshanestack@gmail.com>
Date: Thu, 2 May 2024 13:38:14 -0700
Subject: [PATCH] [datepp] check for TZDIR when looking up zoneinfo

---
 src/third-party/date/src/tz.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/third-party/date/src/tz.cpp b/src/third-party/date/src/tz.cpp
index 26babbd9..8789cd57 100644
--- a/src/third-party/date/src/tz.cpp
+++ b/src/third-party/date/src/tz.cpp
@@ -347,6 +347,11 @@ static
 std::string
 discover_tz_dir()
 {
+    auto tz_dir_env = getenv("TZDIR");
+    if (tz_dir_env != nullptr && tz_dir_env[0]) {
+        return tz_dir_env;
+    }
+
     struct stat sb;
     using namespace std;
 #  ifndef __APPLE__