diff --git a/templates/admin.html b/templates/admin.html
index 17ac608..1386cfb 100644
--- a/templates/admin.html
+++ b/templates/admin.html
@@ -187,15 +187,10 @@
                 </select>
             </div>
             <div class="form-group" style="justify-content: flex-end;">
-                <button class="btn btn-secondary" onclick="previewDates()">Preview Dates</button>
+                <button class="btn" onclick="createSeason()">Create Season</button>
             </div>
         </div>
         <div class="msg" id="dates-msg"></div>
-        <div id="preview-box">
-            <div id="preview-summary"></div>
-            <div id="preview-dates"></div>
-            <button class="btn" id="add-dates-btn" onclick="addDates()" style="display:none;"></button>
-        </div>
     </div>
 
     <!-- PLAYER MANAGEMENT -->
@@ -228,7 +223,6 @@
     <script>
         let existingDates = [];
         let allPlayers = [];
-        let previewResult = null;
 
         // Block XSS chars in text inputs
         document.querySelectorAll('input[type="text"]').forEach(inp => {
@@ -310,16 +304,17 @@
             return dates;
         }
 
-        function previewDates() {
+        async function createSeason() {
             const startStr = document.getElementById('start-date').value.trim();
             const weeks = parseInt(document.getElementById('weeks').value);
             const dayOfWeek = parseInt(document.getElementById('day-of-week').value);
             const datesMsg = document.getElementById('dates-msg');
             datesMsg.textContent = '';
+            datesMsg.className = 'msg';
 
             if (!/^\d{2}\/\d{2}\/\d{2}$/.test(startStr)) {
                 datesMsg.className = 'msg err';
-                datesMsg.textContent = 'Invalid start date. Use DD/MM/YY format.';
+                datesMsg.textContent = 'Invalid start date. Use DD/MM/YY format (e.g. 02/04/26).';
                 return;
             }
             if (!weeks || weeks < 1 || weeks > 104) {
@@ -335,42 +330,20 @@
                 return;
             }
 
-            const existingSet = new Set(existingDates);
-            const newDates = generated.filter(d => !existingSet.has(d));
-            const dupDates = generated.filter(d => existingSet.has(d));
-
-            previewResult = { generated, newDates };
-
-            const summaryEl = document.getElementById('preview-summary');
-            summaryEl.textContent = `${generated.length} dates total: ${newDates.length} new, ${dupDates.length} already in database (skipped).`;
-
-            const datesEl = document.getElementById('preview-dates');
-            datesEl.innerHTML = generated.map(d => {
-                const isNew = !existingSet.has(d);
-                return `<span class="date-chip ${isNew ? 'new' : 'dup'}">${d}</span>`;
-            }).join('');
-
-            const addBtn = document.getElementById('add-dates-btn');
-            if (newDates.length > 0) {
-                addBtn.style.display = '';
-                addBtn.textContent = `Add ${newDates.length} New Date${newDates.length !== 1 ? 's' : ''} to Database`;
-            } else {
-                addBtn.style.display = 'none';
-            }
-
-            document.getElementById('preview-box').style.display = '';
-        }
-
-        async function addDates() {
-            if (!previewResult || previewResult.newDates.length === 0) return;
-            const datesMsg = document.getElementById('dates-msg');
-            datesMsg.textContent = '';
-
-            // Fetch current full data, merge new dates, POST back
+            // Fetch current data and skip existing dates
             const res = await fetch('/api/data');
             const data = await res.json();
-            const mergedDates = [...(data.dates || []), ...previewResult.newDates];
+            const existingSet = new Set(data.dates || []);
+            const newDates = generated.filter(d => !existingSet.has(d));
+            const skipped = generated.length - newDates.length;
 
+            if (newDates.length === 0) {
+                datesMsg.className = 'msg ok';
+                datesMsg.textContent = `All ${generated.length} dates already exist in the database — nothing to add.`;
+                return;
+            }
+
+            const mergedDates = [...(data.dates || []), ...newDates];
             const payload = {
                 players: data.players || [],
                 guest: data.guest || 'Guest',
@@ -387,16 +360,12 @@
             const result = await postRes.json();
 
             if (result.status === 'success') {
-                datesMsg.className = 'msg ok';
-                datesMsg.textContent = `${previewResult.newDates.length} date${previewResult.newDates.length !== 1 ? 's' : ''} added successfully.`;
                 existingDates = mergedDates;
-                previewResult = null;
-                document.getElementById('add-dates-btn').style.display = 'none';
-                // Re-mark chips as duplicates
-                previewDates();
+                datesMsg.className = 'msg ok';
+                datesMsg.textContent = `Done — ${newDates.length} date${newDates.length !== 1 ? 's' : ''} added${skipped ? `, ${skipped} already existed (skipped)` : ''}.`;
             } else {
                 datesMsg.className = 'msg err';
-                datesMsg.textContent = result.message || 'Error adding dates.';
+                datesMsg.textContent = result.message || 'Error saving dates.';
             }
         }