diff --git a/glances/outputs/static/js/components/plugin-alert.vue b/glances/outputs/static/js/components/plugin-alert.vue
index 84543100..5c109f04 100644
--- a/glances/outputs/static/js/components/plugin-alert.vue
+++ b/glances/outputs/static/js/components/plugin-alert.vue
@@ -1,102 +1,111 @@
 <template>
-    <div class="plugin">
-        <section id="alerts">
+  <div class="plugin">
+    <section id="alerts">
             <span class="title" v-if="hasAlerts">
                 Warning or critical alerts (last {{ countAlerts }} entries)
             </span>
-            <span class="title" v-else>No warning or critical alert detected</span>
-        </section>
-        <section id="alert">
-            <div class="table">
-                <div class="table-row" v-for="(alert, alertId) in alerts" :key="alertId">
-                    <div class="table-cell text-left">
-                        {{ formatDate(alert.begin) }}
-                        {{ alert.tz }}
-                        ({{ alert.ongoing ? 'ongoing' : alert.duration }}) -
-                        <span v-show="!alert.ongoing"> {{ alert.state }} on </span>
-                        <span :class="alert.state.toLowerCase()">
+      <span class="title" v-else>No warning or critical alert detected</span>
+    </section>
+    <section id="alert">
+      <div class="table">
+        <div class="table-row" v-for="(alert, alertId) in alerts" :key="alertId">
+          <div class="table-cell text-left">
+            {{ formatDate(alert.begin) }}
+            ({{ alert.ongoing ? 'ongoing' : alert.duration }}) -
+            <span v-show="!alert.ongoing"> {{ alert.state }} on </span>
+            <span :class="alert.state.toLowerCase()">
                             {{ alert.type }}
-                        </span>
-                        ({{ $filters.number(alert.max, 1) }})
-                        {{ alert.top }}
-                    </div>
-                </div>
-            </div>
-        </section>
-    </div>
+            </span>
+            ({{ $filters.number(alert.max, 1) }})
+            {{ alert.top }}
+          </div>
+        </div>
+      </div>
+    </section>
+  </div>
 </template>
 
 <script>
-import { padStart } from 'lodash';
-import { GlancesFavico } from '../services.js';
+import {padStart} from 'lodash';
+import {GlancesFavico} from '../services.js';
 
 export default {
-    props: {
-        data: {
-            type: Object
-        }
-    },
-    computed: {
-        stats() {
-            return this.data.stats['alert'];
-        },
-        alerts() {
-            return (this.stats || []).map((alertalertStats) => {
-                const alert = {};
-                var tzoffset = new Date().getTimezoneOffset();
-                alert.state = alertalertStats.state;
-                alert.type = alertalertStats.type;
-                alert.begin = alertalertStats.begin * 1000 - tzoffset * 60 * 1000;
-                alert.end = alertalertStats.end * 1000 - tzoffset * 60 * 1000;
-                alert.ongoing = alertalertStats.end == -1;
-                alert.min = alertalertStats.min;
-                alert.avg = alertalertStats.avg;
-                alert.max = alertalertStats.max;
-                alert.top = alertalertStats.top.join(', ');
-
-                if (!alert.ongoing) {
-                    const duration = alert.end - alert.begin;
-                    const seconds = parseInt((duration / 1000) % 60),
-                        minutes = parseInt((duration / (1000 * 60)) % 60),
-                        hours = parseInt((duration / (1000 * 60 * 60)) % 24);
-
-                    alert.duration =
-                        padStart(hours, 2, '0') +
-                        ':' +
-                        padStart(minutes, 2, '0') +
-                        ':' +
-                        padStart(seconds, 2, '0');
-                }
-
-                return alert;
-            });
-        },
-        hasAlerts() {
-            return this.countAlerts > 0;
-        },
-        countAlerts() {
-            return this.alerts.length;
-        },
-        hasOngoingAlerts() {
-            return this.countOngoingAlerts > 0;
-        },
-        countOngoingAlerts() {
-            return this.alerts.filter(({ ongoing }) => ongoing).length;
-        }
-    },
-    watch: {
-        countOngoingAlerts() {
-            if (this.countOngoingAlerts) {
-                GlancesFavico.badge(this.countOngoingAlerts);
-            } else {
-                GlancesFavico.reset();
-            }
-        }
-    },
-    methods: {
-        formatDate(date) {
-            return new Date(date).toLocaleString();
-        }
+  props: {
+    data: {
+      type: Object
     }
+  },
+  computed: {
+    stats() {
+      return this.data.stats['alert'];
+    },
+    alerts() {
+      return (this.stats || []).map((alertStats) => {
+        const alert = {};
+        alert.state = alertStats.state;
+        alert.type = alertStats.type;
+        alert.begin = alertStats.begin * 1000;
+        alert.end = alertStats.end * 1000;
+        alert.ongoing = alertStats.end == -1;
+        alert.min = alertStats.min;
+        alert.avg = alertStats.avg;
+        alert.max = alertStats.max;
+        alert.top = alertStats.top.join(', ');
+
+        if (!alert.ongoing) {
+          const duration = alert.end - alert.begin;
+          const seconds = parseInt((duration / 1000) % 60),
+              minutes = parseInt((duration / (1000 * 60)) % 60),
+              hours = parseInt((duration / (1000 * 60 * 60)) % 24);
+
+          alert.duration = padStart(hours, 2, '0') +
+              ':' + padStart(minutes, 2, '0') +
+              ':' + padStart(seconds, 2, '0');
+        }
+
+        return alert;
+      });
+    },
+    hasAlerts() {
+      return this.countAlerts > 0;
+    },
+    countAlerts() {
+      return this.alerts.length;
+    },
+    hasOngoingAlerts() {
+      return this.countOngoingAlerts > 0;
+    },
+    countOngoingAlerts() {
+      return this.alerts.filter(({ongoing}) => ongoing).length;
+    }
+  },
+  watch: {
+    countOngoingAlerts() {
+      if (this.countOngoingAlerts) {
+        GlancesFavico.badge(this.countOngoingAlerts);
+      } else {
+        GlancesFavico.reset();
+      }
+    }
+  },
+  methods: {
+    formatDate(timestamp) {
+      const tzOffset = new Date().getTimezoneOffset();
+      const hours = Math.trunc(Math.abs(tzOffset) / 60);
+      const minutes = Math.abs(tzOffset % 60);
+
+      let tzString = tzOffset <= 0 ? '+' : '-';
+      tzString += String(hours).padStart(2, '0') + String(minutes).padStart(2, '0');
+
+      const date = new Date(timestamp);
+      return String(date.getFullYear()) +
+          '-' + String(date.getMonth()).padStart(2, '0') +
+          '-' + String(date.getDate()).padStart(2, '0') +
+          ' ' + String(date.getHours()).padStart(2, '0') +
+          ':' + String(date.getMinutes()).padStart(2, '0') +
+          ':' + String(date.getSeconds()).padStart(2, '0') +
+          '(' + tzString + ')';
+    }
+  }
 };
 </script>
\ No newline at end of file
diff --git a/glances/outputs/static/public/glances.js b/glances/outputs/static/public/glances.js
index 76763000..e98f4c0f 100644
Binary files a/glances/outputs/static/public/glances.js and b/glances/outputs/static/public/glances.js differ
diff --git a/glances/plugins/alert/__init__.py b/glances/plugins/alert/__init__.py
index 5350ba24..9bc26816 100644
--- a/glances/plugins/alert/__init__.py
+++ b/glances/plugins/alert/__init__.py
@@ -144,8 +144,8 @@ class PluginModel(GlancesPluginModel):
             # New line
             ret.append(self.curse_new_line())
             # Start
-            msg = str(datetime.fromtimestamp(alert['begin'], tz=datetime.now().astimezone().tzinfo))
-            ret.append(self.curse_add_line(msg))
+            alert_dt = datetime.fromtimestamp(alert['begin'], tz=datetime.now().astimezone().tzinfo)
+            ret.append(self.curse_add_line(alert_dt.strftime("%Y-%m-%d %H:%M:%S(%z)")))
             # Duration
             if alert['end'] > 0:
                 # If finished display duration