diff --git a/Dotnet/AppApi/Cef/AppApiCef.cs b/Dotnet/AppApi/Cef/AppApiCef.cs
index 27efe3b6..50e64eae 100644
--- a/Dotnet/AppApi/Cef/AppApiCef.cs
+++ b/Dotnet/AppApi/Cef/AppApiCef.cs
@@ -221,5 +221,28 @@ namespace VRCX
         {
             MainForm.Instance.BeginInvoke(new MethodInvoker(() => { MainForm.Instance.SetTrayIconNotification(notify); }));
         }
+
+        public override void OpenCalendarFile(string icsContent)
+        {
+            // validate content
+            if (!icsContent.StartsWith("BEGIN:VCALENDAR") ||
+                !icsContent.EndsWith("END:VCALENDAR"))
+                throw new Exception("Invalid calendar file");
+
+            try
+            {
+                var tempPath = Path.Combine(Program.AppDataDirectory, "event.ics");
+                File.WriteAllText(tempPath, icsContent);
+                Process.Start(new ProcessStartInfo
+                {
+                    FileName = tempPath,
+                    UseShellExecute = true
+                })?.Dispose();
+            }
+            catch (Exception ex)
+            {
+                logger.Error(ex, "Failed to open calendar file");
+            }
+        }
     }
 }
\ No newline at end of file
diff --git a/Dotnet/AppApi/Common/AppApiCommonBase.cs b/Dotnet/AppApi/Common/AppApiCommonBase.cs
index 08da47eb..27336122 100644
--- a/Dotnet/AppApi/Common/AppApiCommonBase.cs
+++ b/Dotnet/AppApi/Common/AppApiCommonBase.cs
@@ -28,6 +28,7 @@ namespace VRCX
         public abstract void CopyImageToClipboard(string path);
         public abstract void FlashWindow();
         public abstract void SetUserAgent();
+        public abstract void OpenCalendarFile(string icsContent);
 
         // Folders
         public abstract string GetVRChatAppDataLocation();
diff --git a/Dotnet/AppApi/Electron/AppApiElectron.cs b/Dotnet/AppApi/Electron/AppApiElectron.cs
index a491c1be..c59dab33 100644
--- a/Dotnet/AppApi/Electron/AppApiElectron.cs
+++ b/Dotnet/AppApi/Electron/AppApiElectron.cs
@@ -147,5 +147,9 @@ namespace VRCX
         public override void SetTrayIconNotification(bool notify)
         {
         }
+
+        public override void OpenCalendarFile(string icsContent)
+        {
+        }
     }
 }
\ No newline at end of file
diff --git a/src/components/NavMenu.vue b/src/components/NavMenu.vue
index 32f05b0a..6b075553 100644
--- a/src/components/NavMenu.vue
+++ b/src/components/NavMenu.vue
@@ -7,7 +7,8 @@
                     :width="50"
                     :stroke-width="3"
                     :percentage="updateProgress"
-                    :format="updateProgressText"></el-progress>
+                    :format="updateProgressText"
+                    style="padding: 7px"></el-progress>
             </div>
             <div v-else-if="pendingVRCXUpdate || pendingVRCXInstall" class="pending-update">
                 <el-button
diff --git a/src/localization/en/en.json b/src/localization/en/en.json
index 92e84ffa..234c2592 100644
--- a/src/localization/en/en.json
+++ b/src/localization/en/en.json
@@ -1721,10 +1721,12 @@
             "search_no_this_month": "No events this month",
             "event_card": {
                 "category": "Category",
-                "interested_user": "Interested User",
+                "interested_user": "Users Interested",
                 "close_time": "Close Instance After End",
                 "created": "Created Date",
-                "description": "Description"
+                "description": "Description",
+                "export_to_calendar": "Export to Calendar",
+                "download_ics": "Download .ics"
             }
         },
         "moderate_group": {
diff --git a/src/shared/utils/base/date.js b/src/shared/utils/base/date.js
index cb08573a..aa878b2f 100644
--- a/src/shared/utils/base/date.js
+++ b/src/shared/utils/base/date.js
@@ -1,8 +1,64 @@
 import { useAppearanceSettingsStore } from '../../../stores';
 
+function padZero(num) {
+    return String(num).padStart(2, '0');
+}
+
+function toIsoLong(date) {
+    const y = date.getFullYear();
+    const m = padZero(date.getMonth() + 1);
+    const d = padZero(date.getDate());
+    const hh = padZero(date.getHours());
+    const mm = padZero(date.getMinutes());
+    const ss = padZero(date.getSeconds());
+    return `${y}-${m}-${d} ${hh}:${mm}:${ss}`;
+}
+
+function toLocalShort(date, dateFormat, hour12) {
+    return date
+        .toLocaleDateString(dateFormat, {
+            month: '2-digit',
+            day: '2-digit',
+            hour: 'numeric',
+            minute: 'numeric',
+            hourCycle: hour12 ? 'h12' : 'h23'
+        })
+        .replace(' AM', 'am')
+        .replace(' PM', 'pm')
+        .replace(',', '');
+}
+
+function toLocalLong(date, dateFormat, hour12) {
+    return date.toLocaleDateString(dateFormat, {
+        month: '2-digit',
+        day: '2-digit',
+        year: 'numeric',
+        hour: 'numeric',
+        minute: 'numeric',
+        second: 'numeric',
+        hourCycle: hour12 ? 'h12' : 'h23'
+    });
+}
+
+function toLocalTime(date, dateFormat, hour12) {
+    return date.toLocaleTimeString(dateFormat, {
+        hour: 'numeric',
+        minute: 'numeric',
+        hourCycle: hour12 ? 'h12' : 'h23'
+    });
+}
+
+function toLocalDate(date, dateFormat) {
+    return date.toLocaleDateString(dateFormat, {
+        month: '2-digit',
+        day: '2-digit',
+        year: 'numeric'
+    });
+}
+
 /**
  * @param {string} dateStr
- * @param {'long'|'short'} format
+ * @param {'long'|'short'|'time'|'date'} format
  * @returns {string}
  */
 function formatDateFilter(dateStr, format) {
@@ -22,60 +78,23 @@ function formatDateFilter(dateStr, format) {
         return '-';
     }
 
-    function padZero(num) {
-        return String(num).padStart(2, '0');
-    }
-
-    function toIsoLong(date) {
-        const y = date.getFullYear();
-        const m = padZero(date.getMonth() + 1);
-        const d = padZero(date.getDate());
-        const hh = padZero(date.getHours());
-        const mm = padZero(date.getMinutes());
-        const ss = padZero(date.getSeconds());
-        return `${y}-${m}-${d} ${hh}:${mm}:${ss}`;
-    }
-
     let dateFormat = 'en-gb';
     if (!isoFormat && currentCulture) {
         dateFormat = currentCulture;
     }
-    function toLocalShort(date) {
-        return date
-            .toLocaleDateString(dateFormat, {
-                month: '2-digit',
-                day: '2-digit',
-                hour: 'numeric',
-                minute: 'numeric',
-                hourCycle: hour12 ? 'h12' : 'h23'
-            })
-            .replace(' AM', 'am')
-            .replace(' PM', 'pm')
-            .replace(',', '');
-    }
 
-    if (isoFormat) {
-        if (format === 'long') {
-            return toIsoLong(dt);
-        }
-        if (format === 'short') {
-            return toLocalShort(dt);
-        }
+    if (isoFormat && format === 'long') {
+        return toIsoLong(dt);
+    } else if (format === 'long') {
+        return toLocalLong(dt, dateFormat, hour12);
+    } else if (format === 'short') {
+        return toLocalShort(dt, dateFormat, hour12);
+    } else if (format === 'time') {
+        return toLocalTime(dt, dateFormat, hour12);
+    } else if (format === 'date') {
+        return toLocalDate(dt, dateFormat);
     } else {
-        if (format === 'long') {
-            return dt.toLocaleDateString(dateFormat, {
-                month: '2-digit',
-                day: '2-digit',
-                year: 'numeric',
-                hour: 'numeric',
-                minute: 'numeric',
-                second: 'numeric',
-                hourCycle: hour12 ? 'h12' : 'h23'
-            });
-        }
-        if (format === 'short') {
-            return toLocalShort(dt);
-        }
+        console.warn(`Unknown date format: ${format}`);
     }
 
     return '-';
diff --git a/src/shared/utils/base/format.js b/src/shared/utils/base/format.js
index 9c01947d..727b067f 100644
--- a/src/shared/utils/base/format.js
+++ b/src/shared/utils/base/format.js
@@ -33,6 +33,8 @@ function timeToText(sec, isNeedSeconds = false) {
         n %= 60;
     }
     if (isNeedSeconds || (arr.length === 0 && n < 60)) {
+        // round to 5 seconds
+        n = Math.floor((n + 2.5) / 5) * 5;
         arr.push(`${n}s`);
     }
     return arr.join(' ');
diff --git a/src/types/globals.d.ts b/src/types/globals.d.ts
index dc504025..772ad9a0 100644
--- a/src/types/globals.d.ts
+++ b/src/types/globals.d.ts
@@ -190,6 +190,7 @@ declare global {
         FlashWindow(): Promise<void>;
         SetUserAgent(): Promise<void>;
         SetTrayIconNotification(notify: boolean): Promise<void>;
+        OpenCalendarFile(icsContent: string): Promise<void>;
 
         // Common Functions
         GetColourFromUserID(userId: string): Promise<number>;
diff --git a/src/views/Tools/components/GroupCalendarEventCard.vue b/src/views/Tools/components/GroupCalendarEventCard.vue
index 66e2b967..632cc825 100644
--- a/src/views/Tools/components/GroupCalendarEventCard.vue
+++ b/src/views/Tools/components/GroupCalendarEventCard.vue
@@ -14,6 +14,16 @@
                             </div>
                         </template>
 
+                        <el-descriptions-item>
+                            <el-button type="default" :icon="Calendar" size="small" @click="openCalendarEvent(event)">{{
+                                t('dialog.group_calendar.event_card.export_to_calendar')
+                            }}</el-button>
+                        </el-descriptions-item>
+                        <el-descriptions-item>
+                            <el-button type="default" :icon="Download" size="small" @click="downloadEventIcs(event)">{{
+                                t('dialog.group_calendar.event_card.download_ics')
+                            }}</el-button>
+                        </el-descriptions-item>
                         <el-descriptions-item :label="t('dialog.group_calendar.event_card.category')">
                             {{ capitalizeFirst(event.category) }}
                         </el-descriptions-item>
@@ -24,7 +34,7 @@
                             {{ event.closeInstanceAfterEndMinutes + ' min' }}
                         </el-descriptions-item>
                         <el-descriptions-item :label="t('dialog.group_calendar.event_card.created')">
-                            {{ dayjs(event.createdAt).format('YYYY-MM-DD HH:mm') }}
+                            {{ formatDateFilter(event.createdAt, 'long') }}
                         </el-descriptions-item>
                         <el-descriptions-item :label="t('dialog.group_calendar.event_card.description')">
                             {{ event.description }}
@@ -53,12 +63,13 @@
 </template>
 
 <script setup>
-    import { Check } from '@element-plus/icons-vue';
+    import { Calendar, Check, Download } from '@element-plus/icons-vue';
+    import { ElMessage } from 'element-plus';
     import { computed } from 'vue';
     import { useI18n } from 'vue-i18n';
 
-    import dayjs from 'dayjs';
-
+    import { AppDebug } from '../../../service/appConfig';
+    import { formatDateFilter } from '../../../shared/utils';
     import { useGroupStore } from '../../../stores';
 
     const { t } = useI18n();
@@ -107,12 +118,51 @@
         if (props.mode === 'timeline') {
             return formatTimeRange(props.event.startsAt, props.event.endsAt);
         } else {
-            return `${dayjs(props.event.startsAt).format('MM-DD ddd HH:mm')} - ${dayjs(props.event.endsAt).format('HH:mm')}`;
+            return `${formatDateFilter(props.event.startsAt, 'short')} - ${formatDateFilter(props.event.endsAt, 'short')}`;
         }
     });
 
+    async function openCalendarEvent(event) {
+        const content = await getCalendarIcs(event);
+        if (!content) return;
+        await AppApi.OpenCalendarFile(content);
+    }
+
+    async function getCalendarIcs(event) {
+        const url = `${AppDebug.endpointDomain}/calendar/${event.ownerId}/${event.id}.ics`;
+        try {
+            const response = await webApiService.execute({
+                url,
+                method: 'GET'
+            });
+            if (response.status !== 200) {
+                throw new Error(`Error: ${response.data}`);
+            }
+            return response.data;
+        } catch (error) {
+            ElMessage({
+                message: `Failed to download .ics file, ${error.message}`,
+                type: 'error'
+            });
+            console.error('Failed to download .ics file:', error);
+        }
+    }
+
+    async function downloadEventIcs(event) {
+        const content = await getCalendarIcs(event);
+        if (!content) return;
+        const blob = new Blob([content], { type: 'text/calendar' });
+        const link = document.createElement('a');
+        link.href = URL.createObjectURL(blob);
+        link.download = `${event.id}.ics`;
+        document.body.appendChild(link);
+        link.click();
+        document.body.removeChild(link);
+        URL.revokeObjectURL(link.href);
+    }
+
     const formatTimeRange = (startsAt, endsAt) =>
-        `${dayjs(startsAt).format('HH:mm')} - ${dayjs(endsAt).format('HH:mm')}`;
+        `${formatDateFilter(startsAt, 'time')} - ${formatDateFilter(endsAt, 'time')}`;
 
     const capitalizeFirst = (str) => str?.charAt(0).toUpperCase() + str?.slice(1);
 
diff --git a/src/views/Tools/dialogs/GroupCalendarDialog.vue b/src/views/Tools/dialogs/GroupCalendarDialog.vue
index 1304b8b1..ab0964c8 100644
--- a/src/views/Tools/dialogs/GroupCalendarDialog.vue
+++ b/src/views/Tools/dialogs/GroupCalendarDialog.vue
@@ -122,6 +122,7 @@
 
     import dayjs from 'dayjs';
 
+    import { formatDateFilter } from '../../../shared/utils';
     import { groupRequest } from '../../../api';
     import { replaceBioSymbols } from '../../../shared/utils';
     import { useGroupStore } from '../../../stores';
@@ -297,7 +298,7 @@
         const timeGroups = {};
 
         eventsForDay.forEach((event) => {
-            const startTimeKey = dayjs(event.startsAt).format('HH:mm');
+            const startTimeKey = formatDateFilter(event.startsAt, 'time');
             if (!timeGroups[startTimeKey]) {
                 timeGroups[startTimeKey] = [];
             }
@@ -314,7 +315,7 @@
             .sort((a, b) => dayjs(a.startsAt).diff(dayjs(b.startsAt)));
     });
 
-    const formatDateKey = (date) => dayjs(date).format('YYYY-MM-DD');
+    const formatDateKey = (date) => formatDateFilter(date, 'date');
 
     function getGroupName(event) {
         if (!event) return '';