diff --git a/include/fmt/chrono.h b/include/fmt/chrono.h
index e0fd21b1..be8fd1bc 100644
--- a/include/fmt/chrono.h
+++ b/include/fmt/chrono.h
@@ -47,6 +47,7 @@ inline std::tm localtime(std::time_t time) {
     dispatcher(std::time_t t) : time_(t) {}
 
     bool run() {
+      tzset();
       using namespace fmt::internal;
       return handle(localtime_r(&time_, &tm_));
     }