diff --git a/log.js b/log.js
new file mode 100644
index 0000000..2a13020
--- /dev/null
+++ b/log.js
@@ -0,0 +1,17 @@
+const options = { year: 'numeric', day: '2-digit', month: '2-digit', hour: '2-digit', 'minute': '2-digit', second: '2-digit' };
+const osLocale = (process.env.LANG || process.env.LANGUAGE || process.env.LC_ALL || process.env.LC_MESSAGES).split('.')[0].replace('_', '-');
+const dtFormat = Intl.DateTimeFormat(osLocale, options);
+
+export const getTime = () => {
+  return dtFormat.format(new Date());
+}
+
+export const log = (src, msg) => {
+  const time = getTime();
+  console.log(`${time} : ${src} : ${msg}`);
+};
+
+export const error = (src, msg) => {
+  const time = new Date().toISOString();
+  console.error(`${time} : ${src} : ${msg}`);
+}