diff --git a/analytics.py b/analytics.py
index 24981fe..51f3ab4 100644
--- a/analytics.py
+++ b/analytics.py
@@ -95,7 +95,7 @@ def connections():
 @require_secret
 def dashboard():
     filetype_arg = request.args.get('filetype', 'audio')
-    timeframe = request.args.get('timeframe', 'today')
+    timeframe = request.args.get('timeframe', 'last24hours')
     now = datetime.now()
 
     # Determine which file type we're filtering by.
@@ -114,8 +114,8 @@ def dashboard():
         filetype = 'video/'
 
     # Determine start time based on timeframe
-    if timeframe == 'today':
-        start_dt = now.replace(hour=0, minute=0, second=0, microsecond=0)
+    if timeframe == 'last24hours':
+        start_dt = now - timedelta(hours=24)
     elif timeframe == '7days':
         start_dt = now - timedelta(days=7)
     elif timeframe == '30days':
@@ -123,7 +123,7 @@ def dashboard():
     elif timeframe == '365days':
         start_dt = now - timedelta(days=365)
     else:
-        start_dt = now.replace(hour=0, minute=0, second=0, microsecond=0)
+        start_dt = now - timedelta(hours=24)
 
     # We'll compare the textual timestamp (ISO 8601).
     start_str = start_dt.isoformat()
@@ -157,7 +157,7 @@ def dashboard():
 
     # 2. Distinct device trend
     #    We'll group by hour if "today", by day if "7days"/"30days", by month if "365days"
-    if timeframe == 'today':
+    if timeframe == 'last24hours':
         # Group by hour: substr(timestamp, 12, 2) -> HH
         query = f'''
             SELECT substr(timestamp, 12, 2) AS bucket, COUNT(DISTINCT device_id) AS count
@@ -202,7 +202,7 @@ def dashboard():
 
     # 3. Timeframe-based aggregation
     #    We'll group by hour if "today", by day if "7days"/"30days", by month if "365days".
-    if timeframe == 'today':
+    if timeframe == 'last24hours':
         # Hour: substr(timestamp, 12, 2) -> HH
         query = f'''
             SELECT substr(timestamp, 12, 2) AS bucket, COUNT(*) AS count
diff --git a/templates/dashboard.html b/templates/dashboard.html
index 7dee0bd..933caca 100644
--- a/templates/dashboard.html
+++ b/templates/dashboard.html
@@ -30,7 +30,7 @@
       <a href="{{ url_for('dashboard') }}" class="btn btn-primary mt-1">Auswertung</a>
     </div>
     <div class="mb-3">
-      <a href="{{ url_for('dashboard', timeframe='today') }}" class="btn btn-secondary btn-sm mt-1">Today</a>
+      <a href="{{ url_for('dashboard', timeframe='last24hours') }}" class="btn btn-secondary btn-sm mt-1">Last 24 Hours</a>
       <a href="{{ url_for('dashboard', timeframe='7days') }}" class="btn btn-secondary btn-sm mt-1">Last 7 Days</a>
       <a href="{{ url_for('dashboard', timeframe='30days') }}" class="btn btn-secondary btn-sm mt-1">Last 30 Days</a>
       <a href="{{ url_for('dashboard', timeframe='365days') }}" class="btn btn-secondary btn-sm mt-1">Last 365 Days</a>
@@ -177,10 +177,10 @@
     const folderData = {{ folder_data|tojson }};
 
     // shift the labels to local time zone
-    const timeframe = "{{ timeframe }}"; // e.g., 'today', '7days', '30days', or '365days'
+    const timeframe = "{{ timeframe }}"; // e.g., 'last24hours', '7days', '30days', or '365days'
     const shiftedLabels = timeframeData.map(item => {
-      if (timeframe === 'today') {
-        // For "today", the bucket is an hour in UTC (e.g., "14")
+      if (timeframe === 'last24hours') {
+        // For 'last24hours', the bucket is an hour in UTC (e.g., "14")
         const utcHour = parseInt(item.bucket, 10);
         const now = new Date();
         // Create Date objects for the start and end of the hour in UTC
@@ -234,7 +234,7 @@
       }
     });
 
-    // Timeframe Breakdown Chart - Bar Chart (for "today" timeframe)
+    // Timeframe Breakdown Chart - Bar Chart (for 'last24hours' timeframe)
     const ctxTimeframe = document.getElementById('downloadTimeframeChart').getContext('2d');
     new Chart(ctxTimeframe, {
       type: 'bar',