diff --git a/client/src/utils/chatmessages.ts b/client/src/utils/chatmessages.ts
new file mode 100644
index 0000000..53c6053
--- /dev/null
+++ b/client/src/utils/chatmessages.ts
@@ -0,0 +1,57 @@
+/*
+ * Copyright (C) 2022 Savoir-faire Linux Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation; either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public
+ * License along with this program.  If not, see
+ * <https://www.gnu.org/licenses/>.
+ */
+import dayjs from 'dayjs';
+import { i18n } from 'i18next';
+import { Message } from 'jami-web-common';
+
+import { formatCallDuration } from './dates&times';
+
+export const getMessageCallText = (isAccountMessage: boolean, message: Message, i18n: i18n) => {
+  const callDuration = dayjs.duration(parseInt(message?.duration || ''));
+  const formattedCallDuration = formatCallDuration(callDuration);
+  if (callDuration.asSeconds() === 0) {
+    if (isAccountMessage) {
+      return i18n.t('message_call_outgoing_missed');
+    } else {
+      return i18n.t('message_call_incoming_missed');
+    }
+  } else {
+    if (isAccountMessage) {
+      return i18n.t('message_call_outgoing', formattedCallDuration);
+    } else {
+      return i18n.t('message_call_incoming', formattedCallDuration);
+    }
+  }
+};
+
+export const getMessageMemberText = (message: Message, i18n: i18n) => {
+  switch (message.action) {
+    case 'add':
+      return i18n.t('message_member_invited', { user: message.author });
+    case 'join':
+      return i18n.t('message_member_joined', { user: message.author });
+    case 'remove':
+      return i18n.t('message_member_left', { user: message.author });
+    case 'ban':
+      return i18n.t('message_member_banned', { user: message.author });
+    case 'unban':
+      return i18n.t('message_member_unbanned', { user: message.author });
+    default:
+      console.error(`${getMessageMemberText.name} received an unexpected message action: ${message.action}`);
+  }
+};
diff --git a/client/src/utils/dates&times.ts b/client/src/utils/dates&times.ts
new file mode 100644
index 0000000..d95d1ac
--- /dev/null
+++ b/client/src/utils/dates&times.ts
@@ -0,0 +1,40 @@
+/*
+ * Copyright (C) 2022 Savoir-faire Linux Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation; either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public
+ * License along with this program.  If not, see
+ * <https://www.gnu.org/licenses/>.
+ */
+import dayjs, { Dayjs } from 'dayjs';
+import { Duration } from 'dayjs/plugin/duration';
+import { i18n } from 'i18next';
+
+export const formatTime = (time: Dayjs, i18n: i18n) => {
+  return dayjs(time).locale(i18n.language).format('LT');
+};
+
+export const formatRelativeDate = (time: Dayjs, i18n: i18n) => {
+  if (time.isToday()) {
+    return new Intl.RelativeTimeFormat(i18n.language, { numeric: 'auto' }).format(0, 'day');
+  } else if (time.isYesterday()) {
+    return new Intl.RelativeTimeFormat(i18n.language, { numeric: 'auto' }).format(-1, 'day');
+  } else {
+    return dayjs(time).locale(i18n.language).format('L');
+  }
+};
+
+export const formatCallDuration = (duration: Duration) => {
+  const minutes = Math.floor(duration.asMinutes()).toString().padStart(2, '0');
+  const seconds = duration.format('ss');
+  return `${minutes}:${seconds}`;
+};