diff --git a/components/DialogSettings.vue b/components/DialogSettings.vue
index 647d463..991c183 100644
--- a/components/DialogSettings.vue
+++ b/components/DialogSettings.vue
@@ -272,9 +272,7 @@
             class="mb-2"
           >
             <v-list-item-content class="pt-0">
-              <LazyTimezoneSelector
-                @fetch="delayedFetch"
-              />
+              <LazyTimezoneSelector @fetch="delayedFetch" />
             </v-list-item-content>
           </v-list-item>
 
@@ -513,13 +511,6 @@ export default {
       } catch (err) {
       }
     },
-    updateLocaleUtils (event) {
-      try {
-        this.$cookies.set('locale-utils', JSON.stringify(event), { maxAge: 2147483646 })
-        if ((event.oldTZ && event.newTZ) || (!event.oldTZ && !event.newTZ)) this.delayedFetch()
-      } catch (err) {
-      }
-    },
     setColor (type, color) {
       try {
         const tmpCookie = this.$cookies.get('customColorList') || {}
diff --git a/components/TimezoneSelector.vue b/components/TimezoneSelector.vue
index 1fc561c..206b4a2 100644
--- a/components/TimezoneSelector.vue
+++ b/components/TimezoneSelector.vue
@@ -1,21 +1,21 @@
 <template>
   <div>
     <v-subheader
-        class="my-3 pl-0"
-        style="height: 20px"
+      class="my-3 pl-0"
+      style="height: 20px"
     >
-        Utiliser un fuseau horaire personnalisé
+      Utiliser un fuseau horaire personnalisé
     </v-subheader>
     <v-autocomplete
-        v-model="targetTz"
-        :items="timezones"
-        item-text="label"
-        item-value="value"
-        label="Chercher un fuseau horaire"
+      v-model="targetTz"
+      :items="timezones"
+      item-text="label"
+      item-value="value"
+      label="Chercher un fuseau horaire"
     >
-        <template v-slot:item="{ item }">
-            {{ item.label }}
-        </template>
+      <template #item="{ item }">
+        {{ item.label }}
+      </template>
     </v-autocomplete>
   </div>
 </template>
@@ -26,88 +26,88 @@ export default {
   data () {
     return {
       timezones: [ // Merci StackOverflow pour la liste
-          {"label": "(GMT-12:00) International Date Line West", "value": "Etc/GMT+12"},
-          {"label":"(GMT-11:00) Midway Island, Samoa","value":"Pacific/Midway"},
-          {"label":"(GMT-10:00) Hawaii","value":"Pacific/Honolulu"},
-          {"label":"(GMT-09:00) Alaska","value":"US/Alaska"},
-          {"label":"(GMT-08:00) Pacific Time (US & Canada)","value":"America/Los_Angeles"},
-          {"label":"(GMT-08:00) Tijuana, Baja California","value":"America/Tijuana"},
-          {"label":"(GMT-07:00) Arizona","value":"US/Arizona"},
-          {"label":"(GMT-07:00) Chihuahua, La Paz, Mazatlan","value":"America/Chihuahua"},
-          {"label":"(GMT-07:00) Mountain Time (US & Canada)","value":"US/Mountain"},
-          {"label":"(GMT-06:00) Central America","value":"America/Managua"},
-          {"label":"(GMT-06:00) Central Time (US & Canada)","value":"US/Central"},
-          {"label":"(GMT-06:00) Guadalajara, Mexico City, Monterrey","value":"America/Mexico_City"},
-          {"label":"(GMT-06:00) Saskatchewan","value":"Canada/Saskatchewan"},
-          {"label":"(GMT-05:00) Bogota, Lima, Quito, Rio Branco","value":"America/Bogota"},
-          {"label":"(GMT-05:00) Eastern Time (US & Canada)","value":"US/Eastern"},
-          {"label":"(GMT-05:00) Indiana (East)","value":"US/East-Indiana"},
-          {"label":"(GMT-04:00) Atlantic Time (Canada)","value":"Canada/Atlantic"},
-          {"label":"(GMT-04:00) Caracas, La Paz","value":"America/Caracas"},
-          {"label":"(GMT-04:00) Manaus","value":"America/Manaus"},
-          {"label":"(GMT-04:00) Santiago","value":"America/Santiago"},
-          {"label":"(GMT-03:30) Newfoundland","value":"Canada/Newfoundland"},
-          {"label":"(GMT-03:00) Brasilia","value":"America/Sao_Paulo"},
-          {"label":"(GMT-03:00) Buenos Aires, Georgetown","value":"America/Argentina/Buenos_Aires"},
-          {"label":"(GMT-03:00) Greenland","value":"America/Godthab"},
-          {"label":"(GMT-03:00) Montevideo","value":"America/Montevideo"},
-          {"label":"(GMT-02:00) Mid-Atlantic","value":"America/Noronha"},
-          {"label":"(GMT-01:00) Cape Verde Is.","value":"Atlantic/Cape_Verde"},
-          {"label":"(GMT-01:00) Azores","value":"Atlantic/Azores"},
-          {"label":"(GMT+00:00) Casablanca, Monrovia, Reykjavik","value":"Africa/Casablanca"},
-          {"label":"(GMT+00:00) Dublin, Edinburgh, Lisbon, London","value":"Europe/London"},
-          {"label":"(GMT+01:00) Amsterdam, Berlin, Bern, Rome, Stockholm, Vienna","value":"Europe/Amsterdam"},
-          {"label":"(GMT+01:00) Belgrade, Bratislava, Budapest, Ljubljana, Prague","value":"Europe/Belgrade"},
-          {"label":"(GMT+01:00) Brussels, Copenhagen, Madrid, Paris","value":"Europe/Paris"},
-          {"label":"(GMT+01:00) Sarajevo, Skopje, Warsaw, Zagreb","value":"Europe/Sarajevo"},
-          {"label":"(GMT+01:00) West Central Africa","value":"Africa/Lagos"},
-          {"label":"(GMT+02:00) Amman","value":"Asia/Amman"},
-          {"label":"(GMT+02:00) Athens, Bucharest, Istanbul","value":"Europe/Athens"},
-          {"label":"(GMT+02:00) Beirut","value":"Asia/Beirut"},
-          {"label":"(GMT+02:00) Cairo","value":"Africa/Cairo"},
-          {"label":"(GMT+02:00) Harare, Pretoria","value":"Africa/Harare"},
-          {"label":"(GMT+02:00) Helsinki, Kyiv, Riga, Sofia, Tallinn, Vilnius","value":"Europe/Helsinki"},
-          {"label":"(GMT+02:00) Jerusalem","value":"Asia/Jerusalem"},
-          {"label":"(GMT+02:00) Minsk","value":"Europe/Minsk"},
-          {"label":"(GMT+02:00) Windhoek","value":"Africa/Windhoek"},
-          {"label":"(GMT+03:00) Kuwait, Riyadh, Baghdad","value":"Asia/Kuwait"},
-          {"label":"(GMT+03:00) Moscow, St. Petersburg, Volgograd","value":"Europe/Moscow"},
-          {"label":"(GMT+03:00) Nairobi","value":"Africa/Nairobi"},
-          {"label":"(GMT+03:00) Tbilisi","value":"Asia/Tbilisi"},
-          {"label":"(GMT+03:30) Tehran","value":"Asia/Tehran"},
-          {"label":"(GMT+04:00) Abu Dhabi, Muscat","value":"Asia/Muscat"},
-          {"label":"(GMT+04:00) Baku","value":"Asia/Baku"},
-          {"label":"(GMT+04:00) Yerevan","value":"Asia/Yerevan"},
-          {"label":"(GMT+04:30) Kabul","value":"Asia/Kabul"},
-          {"label":"(GMT+05:00) Yekaterinburg","value":"Asia/Yekaterinburg"},
-          {"label":"(GMT+05:00) Islamabad, Karachi, Tashkent","value":"Asia/Karachi"},
-          {"label":"(GMT+05:30) Chennai, Kolkata, Mumbai, New Delhi","value":"Asia/Calcutta"},
-          {"label":"(GMT+05:30) Sri Jayawardenapura","value":"Asia/Kolkata"},
-          {"label":"(GMT+05:45) Kathmandu","value":"Asia/Katmandu"},
-          {"label":"(GMT+06:00) Almaty, Novosibirsk","value":"Asia/Almaty"},
-          {"label":"(GMT+06:00) Astana, Dhaka","value":"Asia/Dhaka"},
-          {"label":"(GMT+06:30) Yangon (Rangoon)","value":"Asia/Rangoon"},
-          {"label":"(GMT+07:00) Bangkok, Hanoi, Jakarta","value":"Asia/Bangkok"},
-          {"label":"(GMT+07:00) Krasnoyarsk","value":"Asia/Krasnoyarsk"},
-          {"label":"(GMT+08:00) Beijing, Chongqing, Hong Kong, Urumqi","value":"Asia/Hong_Kong"},
-          {"label":"(GMT+08:00) Kuala Lumpur, Singapore","value":"Asia/Kuala_Lumpur"},
-          {"label":"(GMT+08:00) Irkutsk, Ulaan Bataar","value":"Asia/Irkutsk"},
-          {"label":"(GMT+08:00) Perth","value":"Australia/Perth"},
-          {"label":"(GMT+08:00) Taipei","value":"Asia/Taipei"},
-          {"label":"(GMT+09:00) Osaka, Sapporo, Tokyo","value":"Asia/Tokyo"},
-          {"label":"(GMT+09:00) Seoul","value":"Asia/Seoul"},
-          {"label":"(GMT+09:00) Yakutsk","value":"Asia/Yakutsk"},
-          {"label":"(GMT+09:30) Adelaide","value":"Australia/Adelaide"},
-          {"label":"(GMT+09:30) Darwin","value":"Australia/Darwin"},
-          {"label":"(GMT+10:00) Brisbane","value":"Australia/Brisbane"},
-          {"label":"(GMT+10:00) Canberra, Melbourne, Sydney","value":"Australia/Canberra"},
-          {"label":"(GMT+10:00) Hobart","value":"Australia/Hobart"},
-          {"label":"(GMT+10:00) Guam, Port Moresby","value":"Pacific/Guam"},
-          {"label":"(GMT+10:00) Vladivostok","value":"Asia/Vladivostok"},
-          {"label":"(GMT+11:00) Magadan, Solomon Is., New Caledonia","value":"Asia/Magadan"},
-          {"label":"(GMT+12:00) Auckland, Wellington","value":"Pacific/Auckland"},
-          {"label":"(GMT+12:00) Fiji, Kamchatka, Marshall Is.","value":"Pacific/Fiji"},
-          {"label":"(GMT+13:00) Nuku'alofa","value":"Pacific/Tongatapu"}
+        { label: '(GMT-12:00) International Date Line West', value: 'Etc/GMT+12' },
+        { label: '(GMT-11:00) Midway Island, Samoa', value: 'Pacific/Midway' },
+        { label: '(GMT-10:00) Hawaii', value: 'Pacific/Honolulu' },
+        { label: '(GMT-09:00) Alaska', value: 'US/Alaska' },
+        { label: '(GMT-08:00) Pacific Time (US & Canada)', value: 'America/Los_Angeles' },
+        { label: '(GMT-08:00) Tijuana, Baja California', value: 'America/Tijuana' },
+        { label: '(GMT-07:00) Arizona', value: 'US/Arizona' },
+        { label: '(GMT-07:00) Chihuahua, La Paz, Mazatlan', value: 'America/Chihuahua' },
+        { label: '(GMT-07:00) Mountain Time (US & Canada)', value: 'US/Mountain' },
+        { label: '(GMT-06:00) Central America', value: 'America/Managua' },
+        { label: '(GMT-06:00) Central Time (US & Canada)', value: 'US/Central' },
+        { label: '(GMT-06:00) Guadalajara, Mexico City, Monterrey', value: 'America/Mexico_City' },
+        { label: '(GMT-06:00) Saskatchewan', value: 'Canada/Saskatchewan' },
+        { label: '(GMT-05:00) Bogota, Lima, Quito, Rio Branco', value: 'America/Bogota' },
+        { label: '(GMT-05:00) Eastern Time (US & Canada)', value: 'US/Eastern' },
+        { label: '(GMT-05:00) Indiana (East)', value: 'US/East-Indiana' },
+        { label: '(GMT-04:00) Atlantic Time (Canada)', value: 'Canada/Atlantic' },
+        { label: '(GMT-04:00) Caracas, La Paz', value: 'America/Caracas' },
+        { label: '(GMT-04:00) Manaus', value: 'America/Manaus' },
+        { label: '(GMT-04:00) Santiago', value: 'America/Santiago' },
+        { label: '(GMT-03:30) Newfoundland', value: 'Canada/Newfoundland' },
+        { label: '(GMT-03:00) Brasilia', value: 'America/Sao_Paulo' },
+        { label: '(GMT-03:00) Buenos Aires, Georgetown', value: 'America/Argentina/Buenos_Aires' },
+        { label: '(GMT-03:00) Greenland', value: 'America/Godthab' },
+        { label: '(GMT-03:00) Montevideo', value: 'America/Montevideo' },
+        { label: '(GMT-02:00) Mid-Atlantic', value: 'America/Noronha' },
+        { label: '(GMT-01:00) Cape Verde Is.', value: 'Atlantic/Cape_Verde' },
+        { label: '(GMT-01:00) Azores', value: 'Atlantic/Azores' },
+        { label: '(GMT+00:00) Casablanca, Monrovia, Reykjavik', value: 'Africa/Casablanca' },
+        { label: '(GMT+00:00) Dublin, Edinburgh, Lisbon, London', value: 'Europe/London' },
+        { label: '(GMT+01:00) Amsterdam, Berlin, Bern, Rome, Stockholm, Vienna', value: 'Europe/Amsterdam' },
+        { label: '(GMT+01:00) Belgrade, Bratislava, Budapest, Ljubljana, Prague', value: 'Europe/Belgrade' },
+        { label: '(GMT+01:00) Brussels, Copenhagen, Madrid, Paris', value: 'Europe/Paris' },
+        { label: '(GMT+01:00) Sarajevo, Skopje, Warsaw, Zagreb', value: 'Europe/Sarajevo' },
+        { label: '(GMT+01:00) West Central Africa', value: 'Africa/Lagos' },
+        { label: '(GMT+02:00) Amman', value: 'Asia/Amman' },
+        { label: '(GMT+02:00) Athens, Bucharest, Istanbul', value: 'Europe/Athens' },
+        { label: '(GMT+02:00) Beirut', value: 'Asia/Beirut' },
+        { label: '(GMT+02:00) Cairo', value: 'Africa/Cairo' },
+        { label: '(GMT+02:00) Harare, Pretoria', value: 'Africa/Harare' },
+        { label: '(GMT+02:00) Helsinki, Kyiv, Riga, Sofia, Tallinn, Vilnius', value: 'Europe/Helsinki' },
+        { label: '(GMT+02:00) Jerusalem', value: 'Asia/Jerusalem' },
+        { label: '(GMT+02:00) Minsk', value: 'Europe/Minsk' },
+        { label: '(GMT+02:00) Windhoek', value: 'Africa/Windhoek' },
+        { label: '(GMT+03:00) Kuwait, Riyadh, Baghdad', value: 'Asia/Kuwait' },
+        { label: '(GMT+03:00) Moscow, St. Petersburg, Volgograd', value: 'Europe/Moscow' },
+        { label: '(GMT+03:00) Nairobi', value: 'Africa/Nairobi' },
+        { label: '(GMT+03:00) Tbilisi', value: 'Asia/Tbilisi' },
+        { label: '(GMT+03:30) Tehran', value: 'Asia/Tehran' },
+        { label: '(GMT+04:00) Abu Dhabi, Muscat', value: 'Asia/Muscat' },
+        { label: '(GMT+04:00) Baku', value: 'Asia/Baku' },
+        { label: '(GMT+04:00) Yerevan', value: 'Asia/Yerevan' },
+        { label: '(GMT+04:30) Kabul', value: 'Asia/Kabul' },
+        { label: '(GMT+05:00) Yekaterinburg', value: 'Asia/Yekaterinburg' },
+        { label: '(GMT+05:00) Islamabad, Karachi, Tashkent', value: 'Asia/Karachi' },
+        { label: '(GMT+05:30) Chennai, Kolkata, Mumbai, New Delhi', value: 'Asia/Calcutta' },
+        { label: '(GMT+05:30) Sri Jayawardenapura', value: 'Asia/Kolkata' },
+        { label: '(GMT+05:45) Kathmandu', value: 'Asia/Katmandu' },
+        { label: '(GMT+06:00) Almaty, Novosibirsk', value: 'Asia/Almaty' },
+        { label: '(GMT+06:00) Astana, Dhaka', value: 'Asia/Dhaka' },
+        { label: '(GMT+06:30) Yangon (Rangoon)', value: 'Asia/Rangoon' },
+        { label: '(GMT+07:00) Bangkok, Hanoi, Jakarta', value: 'Asia/Bangkok' },
+        { label: '(GMT+07:00) Krasnoyarsk', value: 'Asia/Krasnoyarsk' },
+        { label: '(GMT+08:00) Beijing, Chongqing, Hong Kong, Urumqi', value: 'Asia/Hong_Kong' },
+        { label: '(GMT+08:00) Kuala Lumpur, Singapore', value: 'Asia/Kuala_Lumpur' },
+        { label: '(GMT+08:00) Irkutsk, Ulaan Bataar', value: 'Asia/Irkutsk' },
+        { label: '(GMT+08:00) Perth', value: 'Australia/Perth' },
+        { label: '(GMT+08:00) Taipei', value: 'Asia/Taipei' },
+        { label: '(GMT+09:00) Osaka, Sapporo, Tokyo', value: 'Asia/Tokyo' },
+        { label: '(GMT+09:00) Seoul', value: 'Asia/Seoul' },
+        { label: '(GMT+09:00) Yakutsk', value: 'Asia/Yakutsk' },
+        { label: '(GMT+09:30) Adelaide', value: 'Australia/Adelaide' },
+        { label: '(GMT+09:30) Darwin', value: 'Australia/Darwin' },
+        { label: '(GMT+10:00) Brisbane', value: 'Australia/Brisbane' },
+        { label: '(GMT+10:00) Canberra, Melbourne, Sydney', value: 'Australia/Canberra' },
+        { label: '(GMT+10:00) Hobart', value: 'Australia/Hobart' },
+        { label: '(GMT+10:00) Guam, Port Moresby', value: 'Pacific/Guam' },
+        { label: '(GMT+10:00) Vladivostok', value: 'Asia/Vladivostok' },
+        { label: '(GMT+11:00) Magadan, Solomon Is., New Caledonia', value: 'Asia/Magadan' },
+        { label: '(GMT+12:00) Auckland, Wellington', value: 'Pacific/Auckland' },
+        { label: '(GMT+12:00) Fiji, Kamchatka, Marshall Is.', value: 'Pacific/Fiji' },
+        { label: '(GMT+13:00) Nuku\'alofa', value: 'Pacific/Tongatapu' }
       ]
     }
   },
diff --git a/layouts/default.vue b/layouts/default.vue
index 5c083e9..c1872c7 100644
--- a/layouts/default.vue
+++ b/layouts/default.vue
@@ -162,17 +162,10 @@ export default {
   },
   methods: {
     getTime () {
-      const timezone = this.$cookies.get('timezone', { parseJSON: true })?.target || Intl?.DateTimeFormat()?.resolvedOptions()?.timeZone || 'Europe/Paris'
+      const timeZone = this.$cookies.get('timezone', { parseJSON: true })?.target || Intl.DateTimeFormat().resolvedOptions().timeZone || 'Europe/Paris'
 
-      const tzDate = new Date(new Date().toLocaleString('en-US', {
-        timeZone: timezone,
-        year: 'numeric',
-        month: '2-digit',
-        day: '2-digit',
-        hour: '2-digit',
-        minute: '2-digit',
-        second: '2-digit'
-      })) // convert it to defined timezone
+      // convert it to defined timezone
+      const tzDate = new Date(new Date().toLocaleString('en-US', { timeZone }))
 
       return this.$moment(tzDate).format('HH:mm:ss')
     },
diff --git a/pages/index.vue b/pages/index.vue
index 2f50e4c..35fc80e 100644
--- a/pages/index.vue
+++ b/pages/index.vue
@@ -312,6 +312,7 @@
 <script>
 import { mdiMinusBox, mdiTwitter, mdiClose, mdiMail, mdiChevronLeft, mdiChevronDown, mdiFormatListBulleted, mdiCalendar, mdiCalendarToday, mdiCogOutline, mdiChevronRight, mdiSchool, mdiWifiOff, mdiMenuDown, mdiCheckboxBlankOutline, mdiCheckboxMarked } from '@mdi/js'
 import humanizeDuration from 'humanize-duration'
+
 const shortFrenchHumanizer = humanizeDuration.humanizer({
   language: 'shortFr',
   languages: {
@@ -396,7 +397,6 @@ export default {
       tmpP: null,
       nbHours: null,
       lastTimestamp: null,
-
       localeUtils: {}
     }
   },
@@ -669,17 +669,10 @@ export default {
       this.value = this.$refs.calendar.timestampToDate(day)
     },
     updateTime () {
-      const timezone = this.localeUtils?.target || Intl?.DateTimeFormat()?.resolvedOptions()?.timeZone || 'Europe/Paris'
+      const timeZone = this.localeUtils.target || Intl.DateTimeFormat().resolvedOptions().timeZone || 'Europe/Paris'
 
-      const tzDate = new Date(new Date().toLocaleString('en-US', {
-        timeZone: timezone,
-        year: 'numeric',
-        month: '2-digit',
-        day: '2-digit',
-        hour: '2-digit',
-        minute: '2-digit',
-        second: '2-digit'
-      })) // convert it to defined timezone
+      // convert it to defined timezone
+      const tzDate = new Date(new Date().toLocaleString('en-US', { timeZone }))
       this.dateNow = this.$moment(tzDate).format('YYYY-MM-DD')
 
       if (this.$refs.calendar && tzDate.getHours() >= 7) {
diff --git a/server/routes/calendar.js b/server/routes/calendar.js
index b1101a9..c08201f 100644
--- a/server/routes/calendar.js
+++ b/server/routes/calendar.js
@@ -48,8 +48,8 @@ router.get('/calendars', asyncWrapper(async (req, res) => {
   // Get custom timezone and locale
   let localeUtils = null
   try {
-    if (req.cookies?.['timezone']) {
-      const { target, browser } = JSON.parse(req.cookies['timezone'])
+    if (req.cookies?.timezone) {
+      const { target, browser } = JSON.parse(req.cookies.timezone)
       if (target && browser) localeUtils = { target, browser }
     }
   } catch (e) {