diff --git a/src/utils/datetime.ts b/src/utils/datetime.ts
index 5fb4331c..a113e07f 100644
--- a/src/utils/datetime.ts
+++ b/src/utils/datetime.ts
@@ -1,7 +1,8 @@
-import 'moment/dist/locale/th';
 import moment from 'moment';
+import 'moment/dist/locale/th';
+import 'moment/dist/locale/en-gb';
 
-moment.locale('th');
+moment.locale('en-gb');
 
 export function setLocale(locale: string) {
   moment.locale(locale);
@@ -11,12 +12,67 @@ export function dateFormat(
   date?: string | Date | null,
   fullmonth = false,
   time = false,
+  number = false,
 ) {
   const m = moment(date);
 
   if (!m.isValid()) return '';
 
-  const month = m.format(fullmonth ? 'MMMM' : 'MMM');
+  let yearOffset = 0;
+  if (moment.locale() === 'th') {
+    yearOffset = 543;
+  }
 
-  return m.format(`DD ${month} YYYY ${time ? ' HH:mm' : ''}`);
+  if (time) return m.format('HH:mm');
+  if (number) {
+    let formattedNumberDate = m.format('L');
+    if (yearOffset) {
+      const adjustedYear = m.year() + yearOffset;
+      formattedNumberDate = formattedNumberDate.replace(
+        m.year().toString(),
+        adjustedYear.toString(),
+      );
+    }
+    return formattedNumberDate;
+  }
+
+  const monthFormat = fullmonth ? 'MMMM' : 'MMM';
+  const formattedDate = m.format(
+    `DD ${monthFormat} YYYY ${time ? ' HH:mm' : ''}`,
+  );
+
+  // Adjust year for Buddhist calendar if locale is 'th'
+  if (yearOffset) {
+    const adjustedYear = m.year() + yearOffset;
+    return formattedDate.replace(m.year().toString(), adjustedYear.toString());
+  }
+
+  return formattedDate;
+}
+
+function pad(n: number) {
+  return `${Math.floor(Math.abs(n))}`.padStart(2, '0');
+}
+
+function getTimezoneOffset(date: Date) {
+  const tzOffset = -date.getTimezoneOffset();
+  const diff = tzOffset >= 0 ? '+' : '-';
+  return diff + pad(tzOffset / 60) + ':' + pad(tzOffset % 60);
+}
+
+export function toISOStringWithTimezone(date: Date) {
+  return (
+    date.getFullYear() +
+    '-' +
+    pad(date.getMonth() + 1) +
+    '-' +
+    pad(date.getDate()) +
+    'T' +
+    pad(date.getHours()) +
+    ':' +
+    pad(date.getMinutes()) +
+    ':' +
+    pad(date.getSeconds()) +
+    getTimezoneOffset(date)
+  );
 }