diff --git a/README.md b/README.md
index daf9c43..c472a38 100644
--- a/README.md
+++ b/README.md
@@ -116,13 +116,16 @@ To migrate data from the old system:
 2. Transform to new schema format
 3. Import into the new system
 
-## Security
+## Time Zone Handling
 
-- JWT token authentication
-- Password hashing with bcrypt
-- Input validation with Pydantic
-- SQL injection protection via SQLAlchemy ORM
-- CORS configuration for frontend integration
+The system uses UTC (Coordinated Universal Time) as the standard for all time storage and display in aviation contexts:
+
+- **Database Storage**: All times are stored in UTC
+- **Admin Console Display**: Times are displayed in UTC (with Z suffix)
+- **Data Entry**: Times are entered as local time in the New PPR entry form, then automatically converted to UTC for storage
+- **API**: All datetime fields in API responses are UTC ISO strings
+
+This ensures consistency across different time zones and complies with aviation standards where UTC is the international standard.
 
 ## Performance
 
diff --git a/web/admin.html b/web/admin.html
index 0f2c089..00999c6 100644
--- a/web/admin.html
+++ b/web/admin.html
@@ -459,29 +459,29 @@
             color: #007bff;
         }
 
-        @media (max-width: 768px) {
-            .container {
-                padding: 1rem;
-            }
-            
-            .top-menu {
-                flex-direction: column;
-                gap: 1rem;
-                padding: 1rem;
-            }
-            
-            .menu-left, .menu-right {
-                justify-content: center;
-            }
-            
-            .form-grid {
-                grid-template-columns: 1fr;
-            }
-            
-            .modal-content {
-                width: 95%;
-                margin: 2% auto;
-            }
+        .notification {
+            position: fixed;
+            top: 20px;
+            right: 20px;
+            background-color: #27ae60;
+            color: white;
+            padding: 12px 20px;
+            border-radius: 5px;
+            box-shadow: 0 2px 10px rgba(0,0,0,0.2);
+            z-index: 10000;
+            opacity: 0;
+            transform: translateY(-20px);
+            transition: all 0.3s ease;
+            font-weight: 500;
+        }
+
+        .notification.show {
+            opacity: 1;
+            transform: translateY(0);
+        }
+
+        .notification.error {
+            background-color: #e74c3c;
         }
     </style>
 </head>
@@ -659,7 +659,7 @@
                             <input type="text" id="in_from" name="in_from" required placeholder="ICAO Code">
                         </div>
                         <div class="form-group">
-                            <label for="eta">ETA *</label>
+                            <label for="eta">ETA (Local Time) *</label>
                             <input type="datetime-local" id="eta" name="eta" required>
                         </div>
                         <div class="form-group">
@@ -680,7 +680,7 @@
                             <input type="text" id="out_to" name="out_to" placeholder="ICAO Code">
                         </div>
                         <div class="form-group">
-                            <label for="etd">ETD</label>
+                            <label for="etd">ETD (Local Time)</label>
                             <input type="datetime-local" id="etd" name="etd">
                         </div>
                         <div class="form-group">
@@ -724,12 +724,32 @@
         </div>
     </div>
 
+    <!-- Success Notification -->
+    <div id="notification" class="notification"></div>
+
     <script>
         let currentUser = null;
         let accessToken = null;
         let currentPPRId = null;
         let isNewPPR = false;
 
+        // Notification system
+        function showNotification(message, isError = false) {
+            const notification = document.getElementById('notification');
+            notification.textContent = message;
+            notification.className = 'notification' + (isError ? ' error' : '');
+            
+            // Show notification
+            setTimeout(() => {
+                notification.classList.add('show');
+            }, 10);
+            
+            // Hide after 3 seconds
+            setTimeout(() => {
+                notification.classList.remove('show');
+            }, 3000);
+        }
+
         // Initialize the application
         document.addEventListener('DOMContentLoaded', function() {
             initializeAuth();
@@ -911,7 +931,7 @@
             } catch (error) {
                 console.error('Error loading arrivals:', error);
                 if (error.message !== 'Session expired. Please log in again.') {
-                    alert('Error loading arrivals');
+                    showNotification('Error loading arrivals', true);
                 }
             }
 
@@ -944,7 +964,7 @@
             } catch (error) {
                 console.error('Error loading departures:', error);
                 if (error.message !== 'Session expired. Please log in again.') {
-                    alert('Error loading departures');
+                    showNotification('Error loading departures', true);
                 }
             }
 
@@ -1041,20 +1061,18 @@
 
         function formatTimeOnly(dateStr) {
             if (!dateStr) return '-';
-            const date = new Date(dateStr);
-            return date.toLocaleTimeString('en-GB', {
-                hour: '2-digit',
-                minute: '2-digit'
-            });
+            // Ensure the datetime string is treated as UTC
+            const utcDateStr = dateStr.includes('Z') ? dateStr : dateStr + 'Z';
+            const date = new Date(utcDateStr);
+            return date.toISOString().slice(11, 16) + 'Z';
         }
 
         function formatDateTime(dateStr) {
             if (!dateStr) return '-';
-            const date = new Date(dateStr);
-            return date.toLocaleDateString() + ' ' + date.toLocaleTimeString('en-GB', {
-                hour: '2-digit',
-                minute: '2-digit'
-            });
+            // Ensure the datetime string is treated as UTC
+            const utcDateStr = dateStr.includes('Z') ? dateStr : dateStr + 'Z';
+            const date = new Date(utcDateStr);
+            return date.toISOString().slice(0, 10) + ' ' + date.toISOString().slice(11, 16) + 'Z';
         }
 
         // Modal functions
@@ -1070,6 +1088,24 @@
             document.getElementById('ppr-form').reset();
             document.getElementById('ppr-id').value = '';
             
+            // Set default ETA and ETD
+            const now = new Date();
+            const eta = new Date(now.getTime() + 60 * 60 * 1000); // +1 hour
+            const etd = new Date(now.getTime() + 2 * 60 * 60 * 1000); // +2 hours
+            
+            // Format as local datetime-local value
+            function formatLocalDateTime(date) {
+                const year = date.getFullYear();
+                const month = String(date.getMonth() + 1).padStart(2, '0');
+                const day = String(date.getDate()).padStart(2, '0');
+                const hours = String(date.getHours()).padStart(2, '0');
+                const minutes = String(date.getMinutes()).padStart(2, '0');
+                return `${year}-${month}-${day}T${hours}:${minutes}`;
+            }
+            
+            document.getElementById('eta').value = formatLocalDateTime(eta);
+            document.getElementById('etd').value = etd ? formatLocalDateTime(etd) : '';
+            
             // Clear aircraft lookup results
             clearAircraftLookup();
             
@@ -1104,7 +1140,7 @@
                 document.getElementById('pprModal').style.display = 'block';
             } catch (error) {
                 console.error('Error loading PPR details:', error);
-                alert('Error loading PPR details');
+                showNotification('Error loading PPR details', true);
             }
         }
 
@@ -1114,7 +1150,16 @@
                 if (field) {
                     if (key === 'eta' || key === 'etd') {
                         if (ppr[key]) {
-                            field.value = new Date(ppr[key]).toISOString().slice(0, 16);
+                            // ppr[key] is UTC datetime string from API (naive, assume UTC)
+                            const utcDateStr = ppr[key].includes('Z') ? ppr[key] : ppr[key] + 'Z';
+                            const date = new Date(utcDateStr); // Now correctly parsed as UTC
+                            // Format as local time for datetime-local input
+                            const year = date.getFullYear();
+                            const month = String(date.getMonth() + 1).padStart(2, '0');
+                            const day = String(date.getDate()).padStart(2, '0');
+                            const hours = String(date.getHours()).padStart(2, '0');
+                            const minutes = String(date.getMinutes()).padStart(2, '0');
+                            field.value = `${year}-${month}-${day}T${hours}:${minutes}`;
                         }
                     } else {
                         field.value = ppr[key] || '';
@@ -1182,6 +1227,9 @@
                 if (key !== 'id' && value.trim() !== '') {
                     if (key === 'pob_in' || key === 'pob_out') {
                         pprData[key] = parseInt(value);
+                    } else if (key === 'eta' || key === 'etd') {
+                        // Convert local datetime-local to UTC ISO string
+                        pprData[key] = new Date(value).toISOString();
                     } else {
                         pprData[key] = value;
                     }
@@ -1214,12 +1262,13 @@
                     throw new Error('Failed to save PPR');
                 }
 
+                const wasNewPPR = isNewPPR;
                 closePPRModal();
                 loadPPRs(); // Refresh both tables
-                alert(isNewPPR ? 'PPR created successfully!' : 'PPR updated successfully!');
+                showNotification(wasNewPPR ? 'PPR created successfully!' : 'PPR updated successfully!');
             } catch (error) {
                 console.error('Error saving PPR:', error);
-                alert('Error saving PPR');
+                showNotification('Error saving PPR', true);
             }
         });
 
@@ -1243,10 +1292,10 @@
 
                 await loadJournal(currentPPRId); // Refresh journal
                 loadPPRs(); // Refresh both tables
-                alert(`Status updated to ${status}`);
+                showNotification(`Status updated to ${status}`);
             } catch (error) {
                 console.error('Error updating status:', error);
-                alert('Error updating status');
+                showNotification('Error updating status', true);
             }
         }
 
@@ -1271,10 +1320,10 @@
 
                 closePPRModal();
                 loadPPRs(); // Refresh both tables
-                alert('PPR deleted successfully!');
+                showNotification('PPR deleted successfully!');
             } catch (error) {
                 console.error('Error deleting PPR:', error);
-                alert('Error deleting PPR');
+                showNotification('Error deleting PPR', true);
             }
         }