diff --git a/include/spdlog/sinks/file_sinks.h b/include/spdlog/sinks/file_sinks.h
index 6c8f2df0..7d1cb30c 100644
--- a/include/spdlog/sinks/file_sinks.h
+++ b/include/spdlog/sinks/file_sinks.h
@@ -215,7 +215,7 @@ private:
     {
         std::tm tm = spdlog::details::os::localtime();
         fmt::MemoryWriter w;
-        w.write("{}_{:04d}-{:02d}-{:02d}_{:02d}-{:02d}.{}", basename, tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday, tm.tm_hour, tm.tm_min, extension);
+        w.write("{}_{:04d}-{:02d}-{:02d}.{}", basename, tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday, extension);
         return w.str();
     }
 
@@ -230,4 +230,4 @@ private:
 typedef daily_file_sink<std::mutex> daily_file_sink_mt;
 typedef daily_file_sink<details::null_mutex> daily_file_sink_st;
 }
-}
\ No newline at end of file
+}