Improve local datetime display

- Protect author's location privacy
- Reduce locale configuration parameters

_javascript/utils/locale-datetime.js

@@ -0,0 +1,20 @@
+/**
+ * Update month/day to locale datetime
+ *
+ * Requirement: <https://github.com/iamkun/dayjs>
+ */
+
+$(function() {
+  dayjs.locale(LocaleHelper.locale());
+  dayjs.extend(window.dayjs_plugin_localizedFormat);
+
+  $(`[${LocaleHelper.attrTimestamp()}]`).each(function () {
+    const date = dayjs.unix(LocaleHelper.getTimestamp($(this)));
+    const df = LocaleHelper.getDateFormat($(this));
+    const text = date.format(df);
+
+    $(this).text(text);
+    $(this).removeAttr(LocaleHelper.attrTimestamp());
+    $(this).removeAttr(LocaleHelper.attrDateFormat());
+  });
+});